Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce5ba94971825b3…

MALICIOUS

PDF

78.7 KB Created: 2020-12-21 08:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3b20338ea91ae65a9a1f8d3ff0e5515c SHA-1: d1447ee8debccba8d35446c18810ee299d533690 SHA-256: 3ce5ba94971825b3128a5d56b67226e9aa1dc3173e12d094ce5d187ea88cb90a
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are SEO-optimized redirectors pointing to potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' indicate a tactic to lure users with fake download opportunities. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://trafffe.ru/123?utm_term=i+hate+hamlet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453732/normal_5fbebd24e33d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fdde3ba7e27f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452169/normal_5fde68c2d2d8a.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/nasivepem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492901/normal_5fc93621a8159.pdfIn PDF document text
    • https://manoxumumaxu.weebly.com/uploads/1/3/4/4/134472756/bda6262b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478932/normal_5fdc6bc7ceb52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_5fac600489c78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f4a62e34347c70445090/t/5fc170b53c6ccf69f394732c/1606512823123/download_tiger_zinda_hai_full_movie_hd.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1079560f2895dc1e88f35/t/5fc59d7f61e25426e1f8fd31/1606786432964/sony_bravia_32_inch_tv_price.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d3f7084698658e709650/t/5fd16843071bbc68801d4f0c/1607559243938/xedefejirerakowekatexafa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2f976457125654049abe/1606299546492/14474549065.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe0158af67c863bcd193198/t/5fe019786a6ad7222f41966e/1608522104665/difference_between_charismatic_leader_and_transformational_leader.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7b6f43483e57e2cf12c2/t/5fdd1f7d4868181bbe794175/1608327037912/xifizurikokarox.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB9 13184 bytes
SHA-256: 02174ddc721c561bf89020e264f4c216340cccfd85d42eac327fd4087496dd1f
font_01_sfnt_off0000fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3D 4944 bytes
SHA-256: 074f00a18664cdc590f7a0959edea7a14793725cff1cddc90a9cb7afecaa0c1c
font_02_sfnt_off00010aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEE 10140 bytes
SHA-256: ea1e22277a31bde0226216df7ee36f84406ece14016865afde92df090ec2c874