Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c6431c949e8394…

MALICIOUS

PDF

68.7 KB Created: 2020-11-20 05:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ca935d5c57034784f22924f1208f0fc4 SHA-1: 1fb94dad70178c8603971bf6cd240968585a0808 SHA-256: 98c6431c949e83949f6ad54376fdd85b475311cdc9c23cb7a8554fd70a704724
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://traffking.ru/strik?utm_term=black%2527+s+law+dictionary+7th+edition+pdf PDF link annotation
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/10c1aca0b7bfb42.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/betimugi/volk_han_wrestler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f353a9-a992-477c-93e6-8253c5b09a4d/kezeloleranovabuzoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eebb3f51-d8ac-4b3b-a7d0-f390cea5fca2/clinical_neuroanatomy_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/biodegradation_of_pollutants.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/82869485282.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/cours_de_japonais_dbutant.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/gw2_firebrand_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/comma_usage.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/lowes_sheetrock_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/78520989897.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/51896900714.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/arbitration_act_sri_lanka.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/68455436979.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/befikra_song_tiger_shroff.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/zudoruwuvufovajupoligade.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_off0000cd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD44 5664 bytes
SHA-256: 9c3d93f6ecd247e4309d5f5cbdd90c41875566dc17729f10b9068f9552ed6121
font_01_sfnt_off0000e0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A7 11596 bytes
SHA-256: c6849fb60cd92282667aac767b110b890bed42b35ec52a103d9062199b446ada

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