Malicious PDF — malware analysis report

Static analysis result for SHA-256 b288568ea2738220…

MALICIOUS

PDF

80.3 KB Created: 2020-11-25 05:03:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 47304d03c89328453c343a9e44dfe8d4 SHA-1: 111cac967e197961f182a41dcf505ccae211fe1b SHA-256: b288568ea27382209de9d91e834872646c495a36d48e0109950d1b7e2c130639
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://trafffi.ru/strik?utm_term=western+union+form+to+send+money+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5faafa974b3e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_5f95be6711ef2.pdfIn PDF document text
    • https://bevatisaxotel.weebly.com/uploads/1/3/4/3/134378436/4942523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f89fcd11645e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d6cb0e-1ed0-4af4-ac8a-f86926222cbb/74440319407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f8462d-e852-4391-b3ba-0501d3133079/lufojenenokovakesunud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2290fa1b-a820-4467-a4fa-dc9b8ec77f24/gordost_i_predrasude_knjiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcb37ac5-06e2-498d-8dd0-339acee5c95a/tixawovetevozejiwir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/091643f3-00fd-4322-aa81-260861a405d1/hra_daycare_voucher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53888589-25b2-4a63-a5c3-b4eeda2c76eb/victorian_city_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5efe7f-d915-437d-bef7-04fb7ffdeeac/61455434273.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_off00010028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10028 5060 bytes
SHA-256: b23f023186e8e024e422e14bd04948250ad45831a04f3ce378130138a21aa03b
font_01_sfnt_off0001115f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 10332 bytes
SHA-256: e7a92afde77cf07c10fa8fe7e751ebebdbc6a4982175b1a529c8a4fff7dcb2ed

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