Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c00612776b4b8f…

MALICIOUS

PDF

89.4 KB Created: 2021-07-13 19:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b6c6995b97a66a7429e383513d352ef2 SHA-1: 32fa5d319b45eb6b19f3cf034cf8e2f92a7c08f1 SHA-256: 34c00612776b4b8f94ff96a63a2e250317ceadd35b9a83b3ac99df3e60cd499b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal or Forge Credentials

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing attempt impersonating iCloud. It contains a link farm of numerous disposable URLs, many hosted on compromised or disposable domains, designed to redirect users to malicious sites. The primary goal appears to be credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+homework+answers+free.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.hermosabeachbungalows.com/userfiles/files/72832905905.pdf In PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/5228122957.pdfIn PDF document text
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/gadoge.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/62989535391.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785b1ecbf28---lotakugida.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/33936041405.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b792ad89339---livakaxulewuwumakepij.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607576773716f---99437448591.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/58cf58aafe233253000db69be121e3ef/lixotaruforamarabak.pdfIn PDF document text
    • https://cevhertemizlik.com/userfiles/files/21778042626.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2c1a0655---lobuvesumelikute.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/637ae3e1a76906f13e9b98aa04bed7bf/47548637945.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/xezakipuzufosolikuponubi.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/723e4ei5ocd16o2jnhpqv61ut5/tupitadoduxi.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/minijijixekuxuf.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/0665f833710717046309edcba9776565/57696213513.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc34429e763---50954704383.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/62ae1c02d65b2cff2814bbfdf457367b/nusagorakonagemejaku.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/423605c9ee57fe96f2f98c53e06121e8/vopadanaf.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/c138312c059503254912ce056ef10882/ladefamufasabug.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6eca7abd4---kuxavupefele.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/241361471a9920aef6482d992795510d/tuxozaku.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021053103015793.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d78cdfe9a2d---kaxerizalifufepoxepuzule.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/fawegaketolokamugami.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a65cfd17b58---lasiledo.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/ec5aorven3kl5qn9lm9t0ia3m0/pefutozitol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+get+homework+answers+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87B 18056 bytes
SHA-256: 4adcf7c7f88c08271b96d8ae38df0c59557dc78a9e92ef98839899808e3bd5c8
font_01_sfnt_off0001277f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F96 10692 bytes
SHA-256: 866667e5483122c834f26fc39cd4d1fb2896992509ca6a2c75d434cb0b6e5996

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