Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a1d6ea2acd625d…

MALICIOUS

PDF

89.5 KB Created: 2021-06-25 12:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 278b9b84dbe20fa343743cb73f0a7a33 SHA-1: a7167c305b6832170bd7dccab976eeb78c819e9f SHA-256: d2a1d6ea2acd625dc807e24ac75bbc24f92bfa663a9659e0526d5e494fa93173
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress sites, suggesting a phishing or redirection attack. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware delivery or credential harvesting campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://awlights.com/wp-content/plugins/super-forms/uploads/php/files/a6264b15742cd17b52dfa31bc3d81e7c/pavubu.pdf In PDF document text
    • http://imssp.by/data/images/fxeditor/file/58529886521.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/500321943.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/2cc9304f0d7c8657fe2a8fb8ea81c0a5/kegewo.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/bigapiwenetipukop.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9e8a6eced---mupudip.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/u2jl2s7ouqcv6lqddsdbmc1cp3/18271499142.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ukejajogem.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/lefenegumu.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/lilipabivazo.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/lamuzomovadusufu.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2aad2b286---25353550267.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9894b62669---9800256432.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/40070433349.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210617131708.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607994c0e01c8---ritewonudasewisozuvowat.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083d6c60a390---mawumogunepu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/94f2123d955b70ea154b1acc01f990ec/16347614015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=can+bearded+dragons+eat+spinachPDF 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_off0000fb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 17088 bytes
SHA-256: 574e028942e4ae9308cb651c2059fec763aa09224572ee979f69361ad3a6fee1
font_01_sfnt_off00012845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12845 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001405c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405C 10916 bytes
SHA-256: 8a17efb52b83ad356e073f24ccdf367c2a38167b0e662c0492e343c8280e21a8