Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0df3c597445410…

MALICIOUS

PDF

97.4 KB Created: 2021-07-05 10:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cc36937ed360017cf2b8f29122e7b36 SHA-1: 9ceba6cd1749b6cb0f7775ec51b9a1d05508551e SHA-256: 2c0df3c59744541028cdfecf99cfa66a26d5d4f7487af950054ca617a020752e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/080b0dd2970d7d19c70839dd32af75b3/96597628880.pdf
    • https://tckontrola.hr/files/dedozitemube.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16093025992d6f---lubodedefu.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/vapefikekiwebitumomefa.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ce17cf937a6---83986091488.pdf
    • https://aquarell.ro/userfiles/file/rulumo.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/e66998ec95e5dda58aa05126104bf3e4/88030361098.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/b8c29ebece91889f506b19107f0946d4/9206017060.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608b05063bee0---lutaxaxuwemo.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/203esps5r9u6g5n92mpt593lt6/kenadezalibupujuro.pdf
    • https://10glazsikeyrosa.ru/file/35793647885.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788d514020b---12345310816.pdf
    • http://pattarasawat.com/ckfinder/userfiles/files/683668543.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3126c13ed3---nuxagexanuxinazo.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/oppttkktq6erunqfu0bibc7l53/15191245807.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/1a8122febf007374af6f7c30467db425/sogaweragibajaxox.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/mqn5f0kb4fu27637n0crq3o0vl/49458323227.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160810edb120bb---20088441297.pdf
    • http://rmgoals.com/userfiles/files/71541728086.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/de566c7896e02407cab44c713c5c2c89/bilozivadunomisezib.pdf
    • http://micronforgacsolo.hu/UserFiles/file/55882134646.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099a7e056fa6---fugejaverera.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/7062995317.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d66298771---demitinebagapabi.pdf
    • http://collegium-connect.nl/ckupload/files/mowizev.pdf
    • http://westernstudioservice.com/admin/userfiles/file/75855121031.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=emerging+europe+and+the+byzantine+empire+worksheet+answers
    • 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_off000116b2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116B2 16792 bytes
font_01_sfnt_off00012ec9.bin
4ab8bc25b728bc711e5d812ae5e764bbf481a2a1bfd325a4784187cc37a6b980
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC9 11368 bytes
font_02_sfnt_off00014908.bin
0a5ea2eca11a1d8b0056eac664fbd62da1eca28186ed22a319dbbd8a1d9fc21c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14908 17728 bytes