Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e02885e343616a9…

MALICIOUS

PDF

80.7 KB Created: 2021-04-01 06:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 307e008d25d50fc5cf6d5501e97bf36f SHA-1: bb510f4fb80340f63b269dca4923773b33b66e0c SHA-256: 2e02885e343616a9ea19590e40c2aef422090d22174895496b85d4d86e6036a6
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous external URIs strongly indicate this malicious intent. The ML classifier and ClamAV also flagged this PDF as malicious, reinforcing the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/wix?keyword=enchanted+golden+apple+minecraft+pe
    • https://cdn-cms.f-static.net/uploads/4450889/normal_600d08956c6f5.pdf
    • https://cdn.sqhk.co/wejagamewo/iN9gigf/78237211080.pdf
    • https://static.s123-cdn-static.com/uploads/4376125/normal_5ff4191293585.pdf
    • https://cdn.sqhk.co/tipekafomube/nt53ijX/67432581297.pdf
    • https://cdn-cms.f-static.net/uploads/4501810/normal_5fd0f9b905bac.pdf
    • https://cdn.sqhk.co/revowemerem/jff5892/80920925178.pdf
    • https://cdn.sqhk.co/daborofus/j0idUO1/tanks_2_player_online.pdf
    • https://cdn.sqhk.co/nilesatu/WVaZDjc/hill_climb_racing_2_apk_for_pc.pdf
    • https://cdn.sqhk.co/boxokozofe/gg4ghiU/zosubejusafonabe.pdf
    • https://static.s123-cdn-static.com/uploads/4458144/normal_5fee942f7c635.pdf
    • https://tewenamizudeko.weebly.com/uploads/1/3/0/8/130873709/gelijagikelumexibejo.pdf
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/b156780a98.pdf
    • https://cdn-cms.f-static.net/uploads/4393639/normal_6013cfa0f013a.pdf
    • https://cdn.sqhk.co/tojegaxamox/aj3ihBW/50410579939.pdf
    • https://zukevijidogokil.weebly.com/uploads/1/3/0/7/130738647/wojumisagu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/78665bd8-6490-4d36-8bfd-9dbae725055c/8424972633.pdf
    • https://uploads.strikinglycdn.com/files/1da3f272-208b-42c8-bb7e-ebdcc99ccef3/confidence_fitness_treadmill_user_manual.pdf
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_d26f2a3dbf8348898415f9d0645debf9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3a9e9071-515d-4f5f-a88d-deb40cd99b54/90470910936.pdf
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_0dfcc8225d2a4324a6de9e69d4b3bd80.pdf?index=true
    • https://ff999131-262c-4f46-aa1e-84c50d3d9e43.filesusr.com/ugd/a474dd_9169dcb6758145349df896f78c3164e4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fa9566be-8e5a-49ba-88e7-bbd844826064/asp_net_mvc_file_upload_with_progress_bar.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcdc.bin
125ae92f03b5c9e7a299e9e7d8d35791f24d3bca0be121d97fbaf2f89c25be89
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDC 5348 bytes
font_01_sfnt_off00010eea.bin
26b14042fb53adeb235fe033ed06ed294ee7575c166e4c3dd5d6797d0c0130e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEA 11160 bytes