Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6934ac9aa6ada7…

MALICIOUS

PDF

86.4 KB Created: 2021-09-14 21:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ab59787b14a6e2604d596a9f2fa76a56 SHA-1: c589ab003ee793619c8bdbfda8b9d9f5072879f6 SHA-256: ad6934ac9aa6ada7156081090587448234cab4d30b9bd5185c0f8487b18905a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=how+to+get+wifi+password+from+connected+phone PDF link annotation
    • https://toyotaautobody.com/ckfinder/userfiles/files/65043201627.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1612eae90df460---kibepaponaledutu.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/kipisosenofolusabipiv.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613d842b38fde---77716541975.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/detudawe.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/genamufokedalarapuzi.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210914_6538CDEEDBA6B989.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/vewomogununijusujusapo.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/49065394812.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/ed2f2f9939da6ed574fcb0a8c70b732d/43629757674.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210901163053722320.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/bipagisizupavokewiv.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210914071921.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/sofowuguvisetarixate.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/51601273666.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/tivivadanizazoguje.pdfIn PDF document text
    • http://chongqinghaohong.com/upload/files/8301328368.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/solifitiradejupavikug.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/89039582711.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/magizago.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/dexebisofozadusalisedax.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/tugiramidigo.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/wofuxigewasamovuvozodux.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/82464985246.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4ce917d74---3870806272.pdfIn PDF document text
    • 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_off0000eab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB9 17864 bytes
SHA-256: 240304c392194c010f0a599e1e260b351e9f5a7158e9619894e8e118a0ec8236
font_01_sfnt_off000119c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DA 11096 bytes
SHA-256: a8c54c7f97d339bb603526614d5b24babba0b4fd213bf6a9b01f7384b64a5cbc

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