Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57729437f776df1…

MALICIOUS

PDF

54.6 KB Created: 2020-12-15 20:01:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 42dc02f3b31aab281d5c165354955997 SHA-1: 4a5730943c72c90a1391b41bbdb809e52838b19c SHA-256: f57729437f776df14442dd04e3352f97ba34921d231edf1dd30f2c0ee9315cdc
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains multiple external links, including one that redirects to a phishing domain, likely to trick users into downloading malicious content or providing sensitive information. The presence of a link farm heuristic suggests an attempt to manipulate search engine results for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9334

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://trafftec.ru/aws?utm_term=maths+sheets+for+grade+1+printable PDF link annotation
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/1298816.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/lanubili/acknowledgement_letter_format_of_receiving_goods.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/50360452881.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/unblocked_games_222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0540eb5b-3f50-4e39-b45e-065090a598b2/philosophy_notes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66689bdb33045eee7baeb/t/5fccfcd033187724c4f3e451/1607269586186/33234008650.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06d09e5c7695ca9994347/t/5fc19d3d3485235c8603b4a4/1606524222355/the_shrine_movie_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec02434-f4a6-4116-93b8-54c2629665c4/honey_select_party_install.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10996a879396864091186/t/5fc94296adfade30393a421c/1607025302456/black_friday_2020_laptop_deals_dell.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/19537276698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32104772-92a5-4245-bcdc-2588434a6e84/the_doctors_diet_stat_meal_plan.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_off0000c9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C2 5500 bytes
SHA-256: 94272b78a8dd7b0ea9dbb935c5d0ac99b86a14c7c4f8380bbc7dc624074b479a