Malicious PDF — malware analysis report

Static analysis result for SHA-256 5614b1247ab43386…

MALICIOUS

PDF

78.8 KB Created: 2021-06-14 14:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a17e8b38081d5740bcf0e154a6592ee9 SHA-1: 128c3d5a0f7f8942db25cd0e0aec8bc706e5711c SHA-256: 5614b1247ab43386e7d15260683a24b4701f52f2029f14a9fd93b7fee4296489
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body's text, combined with the PDF_URI heuristic, points to a lure using book search terms to encourage clicks on these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=arabella+georgette+heyer+pdf PDF link annotation
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/d5104e3320a81aa8577de4cd41bfdf5a/naniguziwevidexefizu.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/sakinaxigidaxonivuze.pdfIn PDF document text
    • https://chptravel.ir/data/file/36499412987.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/tusokidosiw.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/56003755287.pdfIn PDF document text
    • http://efrex.cz/files/file/47085028918.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/97f4ad7e221c793582055298e6f4f094/61452362052.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cd48b2105---baxebofabebanerevularumel.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/vorogido.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/c703e6d463fc3467aadb95e9ec5772de/sikin.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/90188008742.pdfIn PDF document text
    • https://shopabrang.com/images/files/87046419637.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16073ae5e88324---73332310091.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/7r6ih44q865q4rru2q0c4jhhrn/30493525498.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/36399251245.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C3 5356 bytes
SHA-256: 926f435025d430b14191a26447290b848e8f4a45815351fdff208e9bcce1b94b
font_01_sfnt_off000108f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F7 10856 bytes
SHA-256: c9d6738ff5353866317942be0f7eb81fc1eaf0d2216103c330375ada8b1a6f52

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