Malicious PDF — malware analysis report

Static analysis result for SHA-256 60787a4813251326…

MALICIOUS

PDF

69.0 KB Created: 2021-09-14 07:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f4577b1a45b4f73fb0838e822615e578 SHA-1: 651cbd195250529abee2a8f2d6d4c0ceed670c7b SHA-256: 60787a4813251326f33c08b9a3f86e1d000cdf0798f9f0b67588fa9a0792ae8f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous links to external domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content or download further payloads. The document body is heavily obfuscated and appears to be an image-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://otelm4b.ru/admin/ckfinder/userfiles/files/33249980572.pdf In PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/4835620937.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/29015128556.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/tipaduseteweragasaru.pdfIn PDF document text
    • http://fitviewer.de/files/file/nakajilasazovifuxabodanu.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/mutowetumajetijabog.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/misiwagelatajotawaza.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/kenokixamefizusujiwimamo.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/86868782029.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5aae20cd43a8f79146ba116896b8164c/goropopozew.pdfIn PDF document text
    • https://cape-electronics.com/media/file/25989841982.pdfIn PDF document text
    • https://anjingliar.com/contents/files/wasigepexo.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/vodorusezuzezedibifed.pdfIn PDF document text
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/zuluribexugosobelinada.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134874a5769f---tamefagekekikuzilusi.pdfIn PDF document text
    • http://fcvperu.org/data/fcvperu/userfiles/file/kuvanavowir.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109121945426190.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/tapipofajopimomer.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/moduzemubiza.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/fae40ffd07eff69e1a729ea8ed92234d/kijijiwidew.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/vomamesatogebaju.pdfIn PDF document text
    • https://onsale.social-push.cc/data/fckeditor/files/62853903072.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/30049577293.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+escapists+2+download+for+androidPDF 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_off0000b24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24F 10884 bytes
SHA-256: 7afdd7e60163c41e047d939dc913451621f430282abc022373ce5d0292cfb243
font_01_sfnt_off0000cb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8B 13888 bytes
SHA-256: 001d84a048bb817b1f9b05eb86091c628f7ff3ceec3f063805a30ce5d9f1628a
font_02_sfnt_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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