Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65ad4e17e8387c3…

MALICIOUS

PDF

98.4 KB Created: 2020-12-03 20:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: befbad7c00cb19816e2dc7298b31401b SHA-1: 2ebae899c25747bd8e40c58b8ac3f058c3dc24cf SHA-256: e65ad4e17e8387c36b8011fc6509b75ed00258b278408c0467c94d8311454e5b
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, including a known malicious redirector at 'traffine.ru'. The document's structure and embedded links suggest an attempt to manipulate search engine results or lead users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffine.ru/123?utm_term=grand+theatre+bismarck+movie+listings In PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/282cbc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5fb4a26b97508.pdfIn PDF document text
    • https://lexikujufuwu.weebly.com/uploads/1/3/4/6/134613894/2737710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8e885bcd82e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5fb8f8f5b1ec5.pdfIn PDF document text
    • https://mokogexikimowo.weebly.com/uploads/1/3/4/3/134321985/2b7ce3ed.pdfIn PDF document text
    • https://bizevino.weebly.com/uploads/1/3/4/3/134320064/5430051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_5f8e6d92ee485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462374/normal_5fbbf22f47bba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fd23ae-b417-4b24-bd2b-33f1e9734c41/97880783087.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/catcher_in_the_rye_full_text.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe058c645712565400fa34/1606288781506/the_math_worksheet_site_measurement_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67a0c4b-cb99-44d1-96cb-df7a0667cafe/rexobibezuxasiwam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b91f8cdb769c6d8f2ce/1606372244811/surfing_finnegans_wake.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14224 5648 bytes
SHA-256: 9bf1e43082b688fc3c2a37ce17664078436411be3cad9d8de8f3087a7b3ed64f
font_01_sfnt_off00015532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15532 11644 bytes
SHA-256: 20861e6b840dfbfe1140d194bd1d5018c08febe4a0a39b17b2aaf3db80f6b5d0

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