Malicious PDF — malware analysis report

Static analysis result for SHA-256 869e1e375049653e…

MALICIOUS

PDF

82.0 KB Created: 2020-11-27 10:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1cdafb34058e32385c7383216f15b526 SHA-1: 569c483ef27e0d73fab2cc4be4ea6ace514a6e57 SHA-256: 869e1e375049653e633c201c75e6a348579f0b9401c309d1c221b9d67780b365
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam and phishing. One prominent URL, 'https://trafftec.ru/aws?utm_term=3d+photoshop+cs6+software+free', suggests a lure for free software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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/aws?utm_term=3d+photoshop+cs6+software+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470977/normal_5fa58b5a8376b.pdfIn PDF document text
    • https://sipexagugiresu.weebly.com/uploads/1/3/4/6/134607427/d4a6d6c0dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f870c2d5e9e6.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/derefol.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/8f56f56a-753b-407a-b683-d4a24b9d3ae9/73323064173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98af900d-8e34-4259-8b00-df03ab003f98/autonomy_medical_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a4a0317-a944-43f0-b21d-76e8d15e54f0/51653000943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d29e245-f44c-4c43-86f1-a7cce0f8309e/the_fountain_of_fair_fortune_universal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38af5da8-1e51-4707-a10c-bb9ccffbbbca/botadaxuvaxut.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/my_hero_academia_episode_43_funimation.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/lonely_planet_india_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b994f4-6af5-46c6-81a6-7af8b9a1e2bc/tebudufuromogifigixakebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e9096a-872f-4c7c-acc8-517b2a7a4b53/talking_car_alarms_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45e1193-9ef0-4f0d-a4f2-fb064bd1526a/chicco_keyfit_caddy_instructions.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 5528 bytes
SHA-256: 3138fabbbba1898a0c475d36351bf3cc6595463112ba131da6f3d0dd615e9425
font_01_sfnt_off00011521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11521 11148 bytes
SHA-256: 66d954435c85c2c2ea1a20e3005d501aaafd0db2c970461382b551a116807090

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