Malicious PDF — malware analysis report

Static analysis result for SHA-256 4453bc529bba9774…

MALICIOUS

PDF

60.2 KB Created: 2020-12-19 02:05:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: cafc3637290e602139f321a049bdc8ed SHA-1: caac3794b9077f71261fb53ca9b7412c3e95ec47 SHA-256: 4453bc529bba9774f3664493fe52ee97104749313af6eebaea7c9be73a85e6b7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple embedded URLs, with one pointing to 'trafftec.ru', suggesting a lure to a malicious site. The document body, though heavily obfuscated, appears to be related to a wallpaper download, which is a common social engineering tactic. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, further supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://trafftec.ru/wb?keyword=maze%20cartoon%20labyrinth%203d%20hd%20wallpaper PDF link annotation
    • https://vapuwunenerupig.weebly.com/uploads/1/3/4/7/134727873/df2591da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481515/normal_5fc95cf2be74d.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/fuwugefedu_zuremun_kazawasuzadadel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f891c8e515d4.pdfIn PDF document text
    • https://niwubeleligijoz.weebly.com/uploads/1/3/4/7/134764474/xagakovuruxofusugeda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_5fa422be8f4b2.pdfIn PDF document text
    • https://vuzipelafow.weebly.com/uploads/1/3/4/6/134688966/4361110.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/5fc6c781c89b935f15ddc3c4/t/5fccb8fd662d5e24e09f0693/1607252221977/peleli.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1bf9145a8629dc791d6d/1606294523136/tofu_ice_cream_recipe_the_kitchen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1adea08-991d-4710-b281-4c42945f42aa/download_showbox_free_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/kidorijatetoj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB192 5536 bytes
SHA-256: 672bbbccc443cb7a5a83bc5f50899b70ff78a83a93a0ae4fdf0ccbd37791a76d
font_01_sfnt_off0000c480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC480 9324 bytes
SHA-256: d75b512b493b6a8a96e88c6855d9bcf87255f9c1d7e3b6619e8c5fcc079fedb4

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