Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a5d1368e80f06e…

MALICIOUS

PDF

64.7 KB Created: 2020-12-15 01:03:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6433bf248405c2fc1dc9913e0cc7477f SHA-1: 8cee0db12b3f50547ba934db6b6edb81cd103f75 SHA-256: b6a5d1368e80f06e389d6b76bfa4f54501750cf75b183ab691dc216b4527274e
214 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the document's structure and embedded URLs suggest it's designed to lure users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffking.ru/strik?utm_term=braun+epilator+9 In PDF document text
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/sebiramo.pdfIn PDF document text
    • https://xedexebil.weebly.com/uploads/1/3/4/2/134235570/3236594.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/8309508.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/5fc0ea1fa8793968640865e0/t/5fc1e51a4f98375720248b19/1606542627524/reiki_master_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc526fd92c50b1a1e9314cf/t/5fd17335f2ee360040ee4ca1/1607562038067/79786612069.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5705145a8629dca8066c/1606375173901/64142154179.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/mikafomezapelajaza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc531585bcb0228a29e8486/t/5fcab7d79f1ed260783e031f/1607120856288/42079443554.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/matosufefifakevudazeto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdd38a3bf4b14aba341ea/t/5fc0ef7dfa04221c714164ec/1606479742026/standard_deviants_school_american_government_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/account_manager_sample_interview_questions_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC9 7520 bytes
SHA-256: 0e5263a4eef2157b02fe1de4f5da66ae988b321ec3a36db0eae1e6040e080182
font_01_sfnt_off0000c384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC384 4840 bytes
SHA-256: 786103e317bd5fb40eb6bbd4a98f4e3ffa539add671f10e6ad83f6484b288114
font_02_sfnt_off0000d407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD407 10004 bytes
SHA-256: 9e8757d0dddfc7cd8a04b142d0ea1a510fa6711867b2198cb7ba28a50b841c8e

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