Malicious PDF — malware analysis report

Static analysis result for SHA-256 332c89a1c85680f2…

MALICIOUS

PDF

94.2 KB Created: 2021-06-27 09:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 817edb44c1cb6f9d9fea85847d454524 SHA-1: e2a5723394d7991dd5754d7959f3ecdfb7ac4a30 SHA-256: 332c89a1c85680f25c46a5af808ce05547031f1ea9b82418a91e47175fdab439
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of exploitation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083998018851---jugoguvejivixikisexi.pdf In PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/1992125122.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160905b524cbda---84851913132.pdfIn PDF document text
    • http://teplospectr.ru/images/files/96355840557.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/riwotoxizegatisatenisen.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/iksuq17n8f7vq3svp788pkm3d5/pelubo.pdfIn PDF document text
    • http://imaginove.eu/data/Files/86513754579.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160748fc5b1e2d---barewofun.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/nuvegeritigevi.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/ltn2du5tmoq0aqcbengac1unud/linosiwax.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/dd7ae84ef5fdcc65401c0c9fae2f0c24/88443699940.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/16cef89cae16a22b9a7b14718fb02df2/72150443380.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/29283993650.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/o9csosj94n17bnubua2dbimt1b/tirurogoromudimikut.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160873a5a9177d---40592808674.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f2fee778a---74630252088.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/39013990778.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/javuri.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/kowenunajelajodiwuromuju.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/67121a1de16182536315521a3034d971/35593361829.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea4f7cdd8---21059396944.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/752a0191148691e1e0009a9a3784d429/66074320313.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/143f174b888750cfb9311618483f8653/letiworifamexozali.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/547c290c16fa27b961ee0388210061c6/62772664347.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=why+should+we+hire+you+bpo+answerPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 18284 bytes
SHA-256: 126fc348aad4acab5772801a1932c5a033ae10f955f7e7ad3a1aadfba958275e
font_01_sfnt_off00013922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13922 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15139 10824 bytes
SHA-256: b7d0798aad403b0911699ef1a5682ab7a84193be03c41e2db080803ad115713f

Open this report in the interactive analyzer, or submit your own file for analysis.