Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a65c4e15cf67a64…

MALICIOUS

PDF

105.8 KB Created: 2021-05-06 16:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 03aa3edcd33dcf84e8b6b68f60de68dc SHA-1: 21c1859f69a02080fbab69d6b77151d8225bde7c SHA-256: 0a65c4e15cf67a64a293fd6f5616b5b2e333ee8abb3186665155a2d5d7f2522d
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. The document contains numerous embedded links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The presence of many links on disposable hosting suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://gimoguvi.ru/strik?utm_term=dawson+and+amanda+%2528the+best+of+me%2529+all+of+me+lyrics PDF link annotation
    • https://nolulanulupu.weebly.com/uploads/1/3/1/3/131379612/2297469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5fdb5ae52857d.pdfIn PDF document text
    • http://kabejorudedofom.22web.org/rajuba.pdfIn PDF document text
    • http://kozevoviwepok.iblogger.org/sedik.pdfIn PDF document text
    • http://xajoraxi.22web.org/epidemiologi_marasmus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476126/normal_6034f468ef8dc.pdfIn PDF document text
    • https://tabureribe.weebly.com/uploads/1/3/0/8/130813037/vovot.pdfIn PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/malola-fewumamezinuwi-nemulero.pdfIn PDF document text
    • http://xexisutufas.iblogger.org/all_circuit_symbols.pdfIn PDF document text
    • http://wupulij.22web.org/waxajigixaxexidinoguzet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_604029d350289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_6051bda94a8fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tojozojorezew.epizy.com/palisaxofububiluwip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2454a7e-0e21-4b71-bd90-864c9d6a842b/convert_text_to_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d89c605-ccf5-4038-b873-0efa2fbddba8/what_are_characteristics_of_greek_art.pdfIn PDF document text
    • http://xegewir.epizy.com/vevosuremolenefezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca4448e-e8d3-4f2f-b6a2-f63a98b66b4a/how_to_be_always_positive_thinking.pdfIn PDF document text
    • http://vuvuvemalazot.epizy.com/filehippo_winrar_32_bit.pdfIn PDF document text
    • http://nulidofa.rf.gd/96020350042.pdfIn PDF document text
    • http://dopepekaloza.rf.gd/53737689018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/501c4e38-7f70-4610-9100-4d742411b208/sowugotesigadugumoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1a25d5-8273-4f84-ac2f-67a485c33f6d/20876707190.pdfIn PDF document text
    • http://mogazijanadoro.rf.gd/logo_quiz_answers_level_3_logo_11.pdfIn PDF document text
    • http://bosotosevizava.rf.gd/3424198041.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_off00016035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16035 5748 bytes
SHA-256: 2ae01eab9474ce2ee3c851a5efa216b7241f71ad84da51c03cb5b83e1739de41
font_01_sfnt_off000173cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173CC 10988 bytes
SHA-256: f49d2f65a8b2775026f4100cc807634fb990fe9974af41906e41ed454cdc9b4b

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