Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd2ad897bef4502…

MALICIOUS

PDF

91.5 KB Created: 2020-11-25 09:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5fa5ffa1d023e786a6ba5489604a16b5 SHA-1: 1521f60d43c9acba0b13fbb5c577b1ddffe6d8ec SHA-256: 2bd2ad897bef4502d2db1dfa9275d5c51f4205e5a4993052b7436d44eb7b7dbe
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. One prominent URL, 'https://trafffe.ru/strik?utm_term=donkey+kong+64+wii+download', is presented as a lure for downloading a game, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/strik?utm_term=donkey+kong+64+wii+download PDF link annotation
    • https://wesojejupeledaw.weebly.com/uploads/1/3/4/4/134446418/valijo.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/4117077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369334/normal_5f8b9a4950155.pdfIn PDF document text
    • https://kigikosofo.weebly.com/uploads/1/3/4/0/134041402/4384784.pdfIn PDF document text
    • https://wowujisalot.weebly.com/uploads/1/3/4/3/134349860/tawugixudadikeva.pdfIn PDF document text
    • https://zosetujisux.weebly.com/uploads/1/3/4/2/134266291/ganuwuwaveriwi.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://nuzopotox.weebly.com/uploads/1/3/4/4/134497293/9510454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f8bcde5a8a96.pdfIn PDF document text
    • https://kotuvowomikek.weebly.com/uploads/1/3/4/3/134370123/feluzu_robotavet_wufedu_zutejufop.pdfIn PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/sabugekinifaniki.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/73749e48-2bd2-42cb-92ca-4fe7b8bb3250/wordperfect_x6_macros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ec3a8a4-6b38-4772-98ac-c4d0d8a2aa86/ribilifijefupun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D67 3008 bytes
SHA-256: 09cab215891a42a90f34842f04764b653b8247ba14987e4fe25261271b4e8d09
font_01_sfnt_off00012817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12817 5216 bytes
SHA-256: 16dfa6b8341f7f2ae56ff753ec5e745f2b49c1263c63b56bf0bb586df8326048
font_02_sfnt_off00013a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A18 11372 bytes
SHA-256: 5bb3b8373ac7fe7fe3783c8bb74cf26e3ae9665275026e72f581d0d82a192819

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