Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2478d5e898845ed…

MALICIOUS

PDF

64.6 KB Created: 2020-11-30 11:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 082e3cfbf8f896588d819685f3c64d29 SHA-1: 975c710288a36f28e2bf37bbe2f00c6a7f961bcd SHA-256: c2478d5e898845ed31cf78977788857d9ce2439363a56260fc99a3b9461ffe73
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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/strik?utm_term=busted+mugshots+removal PDF link annotation
    • https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/ketukiduluz-zowowalenow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445544/normal_5fae97221cdb7.pdfIn PDF document text
    • https://zozolexiwu.weebly.com/uploads/1/3/4/3/134343356/4a762c0e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417983/normal_5f9a2cd096207.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/5fc0b633d26ff1194f72bba3/t/5fc1a9991972c46e3cdd29dc/1606527386107/49206572928.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0055e5687f52b6b7c450a/t/5fc120e808845d0924b2b702/1606492394322/20379654887.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c303a13a450babf35031/t/5fc368263570fb44d16ea962/1606641703141/discuss_the_relative_permeability_of_the_membrane_to_na_and_k_in_a_resting_neuron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571c681b-c39c-416c-85fc-3c56189854cb/mijamaripoguxufowujir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf521d9d7936484084d2d2/1606373918203/zexon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7500478-ee86-42dc-9d0b-3961805ce106/66886418447.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c666116eb00e3c4b5099/t/5fc23374e6d49a06bbdbe87b/1606562677567/doctor_who_donna_first_episode.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 2

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_off0000bec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC9 5348 bytes
SHA-256: 2e75ce140cf9bb25b455b7f56b68fcf747f5195f0868d609bb7d3b69549d5692
font_01_sfnt_off0000d0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D0 10924 bytes
SHA-256: c26d2efa95aa2e18baac22f90d5b7861be08e5cf802e48f3388615c05b3027a3

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