Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3e05f6d4baa26f…

MALICIOUS

PDF

86.3 KB Created: 2021-07-05 22:56:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 34ab35318102515b410f7496151a61cf SHA-1: 583e5f4251c8c1d17f122c80b5c308f0b123270f SHA-256: 3b3e05f6d4baa26f9d959d35f0272bc44614ba5ab490ccbd756485e1920709c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm. The presence of these links and the PDF structure strongly indicate a phishing or SEO manipulation attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609165d56cc19---28985047888.pdf In PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/997526da0ff66ee99a4b54ff011fbee5/13152303513.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/norofa.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/8a8173cfadb209bea2f43b84c3e7dba3/boxinasuxomabuvun.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092fe4a0d76f---jefezifed.pdfIn PDF document text
    • http://katachizu.com/img/news/files/lozavuzuxedasi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a803ff88fa5---1084990810.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/qv86u1slcl9dei5s026rf9c2s3/bunazimuzajudusi.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/33972592389.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/280e00a184a46f858b225953d6190e20/63036939407.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/13641153787.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c76e9d3516---gagemagamipujopozixafa.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/g1r1a4k53ig39jjadmah8je6b3/11678271198.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/74381485673.pdfIn PDF document text
    • https://edcasys.com/ci/userfiles/files/doxiwirijejifugurarigezug.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/82555202246.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606dc6811e0f7---85944778073.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/21852808482.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609deef2b25a8---52735481671.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a591f1b0897---wakodiradujuwudezomaw.pdfIn PDF document text
    • https://webmenuplus.com/images/file/71800294567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=antonyms+of+words+from+a+to+zPDF 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_off0000ee80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10697 10484 bytes
SHA-256: 8bab860cdb78cc333b1617b2a9b925709ae742426220647a237334223d35a042
font_02_sfnt_off00011e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 17384 bytes
SHA-256: 577998fdd9f4e64c9c1ac5e7506229790f1e0d5bc4ec9b77bacb728eb82390bd

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