Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f256c49d43ebfd8…

MALICIOUS

PDF

69.6 KB Created: 2021-01-06 11:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 189d1b78152044146fc263dbf5282830 SHA-1: 5eace6d7472bef01b3f6a351bcd24a2c32e6b332 SHA-256: 3f256c49d43ebfd8857cc803ce02e11cc1d8d22e15bee5a16d79f05b7aa357ea
194 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 are part of an SEO link farm designed to redirect users to potentially malicious sites. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK indicate a phishing or scam attempt. The ClamAV detection and ML classifier further support its malicious nature, classifying it as Pdf.Phishing.Trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9668

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://trafficel.ru/aws?utm_term=matrimonial+biodata+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455645/normal_5fb8c1d47dbfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368486/normal_5ff491b8f2861.pdfIn PDF document text
    • https://wemovimezatura.weebly.com/uploads/1/3/4/6/134611727/8197189.pdfIn PDF document text
    • https://fojojaroj.weebly.com/uploads/1/3/1/4/131453509/7886471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423431/normal_5f9c9c51e48f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5fd6e3bc02052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426543/normal_5fe31880d5e79.pdfIn PDF document text
    • https://kepemumud.weebly.com/uploads/1/3/1/4/131454984/nisununetodix.pdfIn PDF document text
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/tuleputilenu.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/ganubifirigevi/the_big_short_parents_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c849d29-b5d4-4e75-bfc4-b77ddb7afde4/73294483640.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/57966664939.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/acument_global_technologies_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/dataflow_report_moh.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/scientific_laboratory_report_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd23d08-07c6-4319-83e1-1876fb54f320/ralovad.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 5072 bytes
SHA-256: 8ad82acf8fe0d3830c2a5b809cc0b601c99933c4b40a921c5447b84e0e259a43

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