Malicious PDF — malware analysis report

Static analysis result for SHA-256 0375ebe131bff729…

MALICIOUS

PDF

100.9 KB Created: 2021-03-06 00:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a42e9673e1c12fedea130c47155e41c0 SHA-1: a73509933e44ec17b8a3c9908dbf172d1e40742f SHA-256: 0375ebe131bff729c174dd1ac4e9d75d3e485b7ef31abbd96811a832b43020e3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm or SEO manipulation scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs point to potentially malicious or disposable hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://botokaw.ru/strik?utm_term=how+to+explain+complex+information PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443812/normal_5ff498e8be4d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411918/normal_5fc6126db67ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_6015feec1225d.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/mefopiratesampwghg.pdfIn PDF document text
    • http://dezlice.ru/gepiwusumiraq1uid.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/ijOABib/42841121226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424645/normal_5fd34857777fb.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/JvTjagf/50414447656.pdfIn PDF document text
    • http://tesar-krd.ru/billie_eilish_my_future_lyrics_terjemahanf3l61.pdfIn PDF document text
    • https://neveloso.weebly.com/uploads/1/3/1/4/131408616/2623730.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/ialhgji/30387245692.pdfIn PDF document text
    • https://lepamatizetu.weebly.com/uploads/1/3/0/7/130739269/mupotu-xejepopukize-zovamede-binabuj.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/gjicjcr/safudaji.pdfIn PDF document text
    • http://sfhgfje5df.xyz/8756417924607xw4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_67fc7f04626f469ebdaa160ce4d586e8.pdf?index=trueIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_e044d714d8ae4f358511c576a20223c5.pdf?index=trueIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_4a263ffc94c44b8685945213452034f9.pdf?index=trueIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_b973728daebb43afb81079ee11c029d4.pdf?index=trueIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_7655a7ef9b0e4ea2acca1b4a94e2c7e2.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_d9778a2054c4478a9cf4f0d821c78b9d.pdf?index=trueIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_42a6c461ed9744c0ac1cc979eb0dd2c9.pdf?index=trueIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_c13978319f544d6cb36f1ea45f513e01.pdf?index=trueIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_44697b7e444946be8ed33bd780fabb6b.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B05 5104 bytes
SHA-256: 44cf6acf6fddb9440fd0854e0425a9da399ce47a2da44bf41b62e0f87a5d14b9
font_01_sfnt_off00013c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5A 2948 bytes
SHA-256: 669327c6c2655c7e10a71d2b50724fa285b9d752b90ce69cdcd9039cd3fdc8b4
font_02_sfnt_off000148b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B9 10668 bytes
SHA-256: b487336b4bc404108fb9ab3bc05473793398229f6a2bb4fab05fcb8dde477b77
font_03_sfnt_off00016d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D8B 16392 bytes
SHA-256: 6a4acb655a93af99c034fefb5cf629d98fc6daa8f4c706f013e0139d3a062ba1

Open this report in the interactive analyzer, or submit your own file for analysis.