Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcc9fee73cbb53c…

MALICIOUS

PDF

69.6 KB Created: 2021-01-26 18:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7fe6b778d3806046d63e374f580dedfc SHA-1: a6f7bab47067f3571a24066acc960def0933d272 SHA-256: 7dcc9fee73cbb53c5e8e6cc9cb6a1667494340a8e615e86a9c5a280fc91e5084
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which point to SEO-optimized PDFs, suggesting a link farm or phishing lure. The primary redirector URL, 'https://seumenha.ru/aws?utm_term=forward+whatsapp+to+email+android', is associated with a 'free-download phishing' lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9635

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://seumenha.ru/aws?utm_term=forward+whatsapp+to+email+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394082/normal_60101035bdbce.pdfIn PDF document text
    • https://pozemake.weebly.com/uploads/1/3/0/7/130776760/4323569.pdfIn PDF document text
    • https://cdn.sqhk.co/tovisegag/HhaEHvr/90398879447.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/gezuteze.pdfIn PDF document text
    • http://kosiwixiwumizu.iblogger.org/gefuwuxije.pdfIn PDF document text
    • https://cdn.sqhk.co/jerizukop/ALnIijl/sabuvapojukoxeditiwibabuj.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/jjauMnD/judokiko.pdfIn PDF document text
    • https://fiwaluveniwob.weebly.com/uploads/1/3/5/3/135395264/c22d28ba.pdfIn PDF document text
    • https://dananiruw.weebly.com/uploads/1/3/2/7/132741593/rupusiv-demotobexozanam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/9747217660.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/86756302337.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/blogspot_de_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/21784410703.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2A 5244 bytes
SHA-256: 80944dadd57dbdd1b573668e3326231bce9ac77a576689b9958196d197fe512d
font_01_sfnt_off0000eee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE5 11608 bytes
SHA-256: bab138fce7f136073ad52a831767d6c143cf73c2e7223a37ce08713cc2b3b273

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