Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5dc3c22d6d9b60d…

MALICIOUS

PDF

89.7 KB Created: 2021-06-26 04:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0cec98ae3495462bf294bc51cb43bfdd SHA-1: 8ea119e7c9b10cc5da5322be2f0b141b6d83d4b9 SHA-256: e5dc3c22d6d9b60d3271087062c5a7e0ae897d8604dd85b4e5ad4b7885cc4188
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://x04ydivan.ru/userfiles/file/dabogumevonuzisowuzo.pdf
    • http://montagnobozzone.it/userfiles/files/gamatudikopofoxefarurorig.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b45f16052---75384945252.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/60d3c3f4ba772bdf796e8080f71832d0/kixukujedujipokijema.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091110522dce---teraz.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdd44377e7---wegudadudonokutoja.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fa47cbf06---75068683523.pdf
    • https://computerzone.pk/file/79827912760.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086dc49e8ca1---33561810689.pdf
    • https://citronixdeflection.com/nbloom/fckuploads/file/lajinulotone.pdf
    • https://alice-immo.com/userfiles/file/3369201644.pdf
    • https://mongolia-volkslift.com/uploads/files/jijojulevug.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/5f6f5ee96bb6fa71db2414ca39721133/56585777706.pdf
    • http://beiwendq.com/userfiles/file/35327517005.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/kbdjag8ljn13399v7o0ppgp468/97143588362.pdf
    • http://esthebel.de/userfiles/file/zinagirozowasemu.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0787bac49---mosesojowerosidisid.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/98ceae705a991a9bfc4effbb3bd51b1e/84853763301.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16091785ac0950---xulexupuxenisufonuxonan.pdf
    • https://abugfreemind.com/userfiles/file/35288776952.pdf
    • http://falerisztika.hu/tmp/3409648807.pdf
    • http://afghansolar.com/userfiles/file/mozixuvegit.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=lion+tattoo+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc35.bin
46ed7889a63a11d797c25627ef79a296797b2857ac9b9857b78515052193f362
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC35 10092 bytes
font_01_sfnt_off000112a7.bin
f94d89388b3b266b1aba8cd5802f8982a3fe050ed3be43b89806c3852a0d049d
pdf-font-stream PDF embedded font (sfnt) at offset 0x112A7 17924 bytes
font_02_sfnt_off0001419d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1419D 16792 bytes