Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b5d76c5728e4ed…

MALICIOUS

PDF

81.3 KB Created: 2021-06-23 06:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bda11f2ce5f8b315d22ed5b355525410 SHA-1: 659f4a3f22a97d68044a5211991106615f033027 SHA-256: c3b5d76c5728e4edf080c7e53370237c6948eeb00133a51d32e71c4d4256ed8b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous links to compromised CMS uploads and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure for downloading a movie, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=aladdin+full+movie+tamil+dubbed PDF link annotation
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9eead011a1---28084126952.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/012f080a12692d0c1cb1e37891339c72/kukagumaresosobafizedapo.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/gakatirur.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/imsjjpg7730u4evtg4p7d6d0ur/nupejojulezevemesediguz.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/8a7b5b5880382ffc0473775e22aa5974/rupavoruxexasivafezasot.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/98443254015.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/zolagiwanem.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607a963c7e557---53925647941.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788b06bd3e0---foziloxuzakebogef.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7f150e074---57382195719.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/58317791756.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/698a4502847baebfa3bfa5818289c3f1/xagarikadixozi.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdd477e86e---kimofofogogigeloriwekuvaf.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/a0dd14a6f3cbbbc4d317df4915e408e6/92524866768.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae50567e2d---besedopetozemunofafamo.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada033c705e---xexavagoxijasog.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f49c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF49C 11728 bytes
SHA-256: 35d09ce64502fed3eba8fc5787b5bf488dbdfdbe65a15b04a76e1cb328b4be5e
font_00_sfnt_off0000e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BB 4968 bytes
SHA-256: 5b88edd645f5a3bd86b4fed070d9c077afd3a62a6f2f53351620746da34b83ac
font_02_sfnt_off000111fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FA 10944 bytes
SHA-256: 06f88ad0b419959f2ef80bb1cf7e554731fa9b8b0bbf4a9b4b59ba670464c579

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