Malicious PDF — malware analysis report

Static analysis result for SHA-256 45947df31b365fab…

MALICIOUS

PDF

96.9 KB Created: 2020-12-19 22:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 62f187c57657a375a1b8ea1d0f12daf7 SHA-1: bbb9495a8ec6bb178e566b417e645662de1deaa2 SHA-256: 45947df31b365fab27309f96ff624516ac9df9968257b407dd8a5282f3be28db
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or traffic-generation scheme. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a phishing or malicious redirection attack, likely initiated via a spearphishing attachment.

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
  • 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/123?utm_term=negative+heel+shoes+for+plantar+fasciitis PDF link annotation
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/zanemorelixudoso.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/sivoxu-tubiwusuke-zenosuj-vugufiliwopes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_5fdc3f1e468d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fde31f37f805.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/4340692.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/nagev/football_dice_game_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/wubopegamugonuxaxeri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ab3ea9-a75a-4dee-bf97-e43e5a739a4b/purpose_of_photosynthesis_in_a_cell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61dfed17-ea6a-4820-bcaa-a29d50528ea7/kadatubezekazanamek.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcaa7c5e71df64d6bdd8f6/t/5fdd2bc62da99c2868fe897c/1608330183409/granny_game_pc_version.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/49129313403.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/peforanugemotob.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_off000141df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141DF 5308 bytes
SHA-256: b00ab6f631dc5c38b7b2e95a883fb2f9c88c7e31097b6846f764b540f8807148
font_01_sfnt_off000153ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153FF 10344 bytes
SHA-256: e49d9bb5e4ee64807ce0dfce946bee1b348b8726f8e03bc943c99d7c35fd9e79

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