Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1a75b507dd7235…

MALICIOUS

PDF

66.3 KB Created: 2020-12-17 10:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5c0c583bee09f406cbbf4dd95c76505d SHA-1: da3edac61a1fedfe8f101a297e350f12e0842df7 SHA-256: fd1a75b507dd7235ba9ae2f63052ced0b37e898c4f42d9b7e9d555a9f15900c6
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-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.
  • 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://trafficel.ru/123?utm_term=lake+seminole+florida+homes+for+sale PDF link annotation
    • https://gatixitawenubik.weebly.com/uploads/1/3/4/6/134643062/5657207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_5fd2cec4aebc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_5f96d347f395b.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/5fc573685bcb0228a2a13196/t/5fd071bb3bcf75077a82e333/1607496123381/word_chums_remove_game.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/jufafesatutabi.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/65056976320.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3696f7848ba205d2893e8/t/5fca0d333ff94c207e0fae02/1607077172184/27693092351.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/6th_pay_commission_wb.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/islcollective_jobs_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3180a330-1aa3-4e28-a977-f76ef0ca1171/microwave_transformer_amps.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/last_shelter_survival_troop_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d242ce1-27d5-4de4-a253-0c4e66af7705/lukepi.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_off0000c829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC829 5152 bytes
SHA-256: f639be874abb612e317ebc5058b715574351f1f367b52c9b090bd1c98cf2cde1
font_01_sfnt_off0000d988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD988 10088 bytes
SHA-256: e207f9a1b09ebbd9261a46d7b02bd53f9847ec314912335e1cbea29b1dff827f

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