Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd6957108e18159…

MALICIOUS

PDF

80.4 KB Created: 2021-08-27 20:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3d852479162822e69dedd99c83b6b9a7 SHA-1: e9d1734a055ce33137728f119020fe937f623be7 SHA-256: 7dd6957108e181592fe263e8368cd320a1de35079b87ad1cdc59af2668cfd68d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://www.privathospitaletkollund.com/ckfinder/userfiles/files/rajemamesopu.pdf In PDF document text
    • http://safeabortionnepal.com/userfiles/file/rigegiji.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/47207423154.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4637ab7669---zebasigemeriwika.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/7304707217.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/6446a501fdb1b3f905db6a0c2f2db519/72178329753.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/51742662468.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945f62a6066---paroximisovakolojegovesi.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbefa23be8---gosamafakukureki.pdfPDF link annotation
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/e226c4vdai5ishcpat0smsuql6/57017027818.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/tovejowemeni.pdfIn PDF document text
    • https://artenika.pl/fck/file/14238402773.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae9bc8b3da---pulafukaf.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021052900493973499.pdfIn PDF document text
    • http://praguetransfer.com/files/file/rawimoruxijoxiruk.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cf3f1f61c21---59769502314.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e7c09427441---80992680579.pdfIn PDF document text
    • https://kajariaadsevents.com/admin/uploads/file/kebuwirotewole.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/3d6fd4d0dc1c897ccb1f52aab1bdebcb/92036018784.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/cveop2bk2t2g1l99dlvam1j2dv/51077812283.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b131fb0c6c0---49503543037.pdfIn PDF document text
    • http://www.neocota.com/fckimages/file/mufipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=your+father%27s+housePDF 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_off0000d478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD478 10184 bytes
SHA-256: 01d0a14db2fe5e07db8720a454d6ce40645f8af09dd28f12d0144c5a8684539a
font_01_sfnt_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 17896 bytes
SHA-256: 22d4826f71c7ae0b26b5f085a27828ace983dc016c9220c89c395ea5023fac9e
font_02_sfnt_off00011a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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