Malicious PDF — malware analysis report

Static analysis result for SHA-256 434add168960ad5a…

MALICIOUS

PDF

83.1 KB Created: 2021-03-05 11:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: aa819a00e13b4eefce4e989da920d9c4 SHA-1: 82226bcb7a907c137be60a9fb0df740e4dd734b6 SHA-256: 434add168960ad5a67fab9d2cdcf819ded0dd878f297c9fd215b20d882e8e2ec
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that likely lead to phishing sites or malware downloads. The document body, though heavily obfuscated, appears to contain metadata related to its generation, suggesting it was programmatically created to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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.
  • 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://seumenha.ru/award?keyword=toro+824+snowblower+manual PDF link annotation
    • https://wojosonasejedop.weebly.com/uploads/1/3/4/6/134613238/9112895.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/KKhjxif/ikea_desk_hack_kallax.pdfIn PDF document text
    • https://vonufire.weebly.com/uploads/1/3/4/5/134596457/06e537c4cb60.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/hdiempv/setifasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393208/normal_5fe42381d3bc8.pdfIn PDF document text
    • https://muluxebaxomoj.weebly.com/uploads/1/3/5/4/135401331/3a3b8be9ad241a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_602aa45958584.pdfIn PDF document text
    • https://dofisizowi.weebly.com/uploads/1/3/4/3/134327642/jarawo-jitujox-sobinu.pdfIn PDF document text
    • https://sunanineriputa.weebly.com/uploads/1/3/2/7/132740954/5314186.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/gfjeKah/auto_reply_outlook_iphone.pdfIn PDF document text
    • https://vowexigap.weebly.com/uploads/1/3/1/6/131636774/sinaxevisosazexeten.pdfIn PDF document text
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/sowefino-kogerawizapoxug.pdfIn PDF document text
    • https://dexulana.weebly.com/uploads/1/3/4/2/134234773/6333286.pdfIn PDF document text
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/dafamuko_zives_minurida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458829/normal_5fcb22bc983cc.pdfIn PDF document text
    • https://mitebisaxu.weebly.com/uploads/1/3/5/3/135395238/5e1a724cd8a6320.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/rrgiKXz/biological_evolutionary_psychology_definition.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369926/normal_5fd09c7ae6077.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/hhdRB2b/veroxozado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_d72345f59adf4a6fa0aa1076c63fcc5f.pdf?index=trueIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_4c6880c0b3334cf1a5a594d4702d91fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/janodojivi/ukulele_blues_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/6757739926.pdfIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_0faac2d6472a45b3995321dc3b06d3c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/58240211522.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/four_seasons_taeyeon_piano_sheet_music.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_73e0d997ae474b8ba1b4e774b5b9c408.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_d68c55cfa4314446ae0b5d79d85a06da.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 5428 bytes
SHA-256: d64d325cfa4713a2d89b9e57fe7253de7d160ad8d84f2b56903e692f810be1aa
font_01_sfnt_off00011a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9B 10652 bytes
SHA-256: e3252ea8b9aefaea2be3b1d8043196135cc62a52769e3adc961e564e5613975a

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