Malicious PDF — malware analysis report

Static analysis result for SHA-256 01dc5d4dfdb1690a…

MALICIOUS

PDF

93.0 KB Created: 2021-04-30 10:59:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 75dc9816b7104d7fbc1b2903f9a5f66e SHA-1: b09712c9661511ba7d871a33608b2814b4de74e2 SHA-256: 01dc5d4dfdb1690a7f1f889fa9908180e1f6b075c0f251361f39d1215df4f15c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://kuzutuzo.ru/strik?utm_term=partituras+para+piano+de+canciones+cristianas+pdf PDF link annotation
    • http://brumbum6.xyz/92536617190exyjy.pdfIn PDF document text
    • http://tameeniraq.com/how_to_set_the_time_on_adidas_digital_watchx4ra2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469365/normal_60520f459d23c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451941/normal_606a130f93591.pdfIn PDF document text
    • http://welitewusubo.iblogger.org/wibexotibipozuzakalarabim.pdfIn PDF document text
    • http://winwites.space/66797245341gktkz.pdfIn PDF document text
    • http://gonunimob.iblogger.org/81046571803.pdfIn PDF document text
    • http://bluebadgeform.com/xiferibazuleykdt2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_60289cdd7eaaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_604cbf86e498a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_d3931b74b1914415be7936652d03260f.pdf?index=trueIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_39b7fcdcf44e408c9d799f6ba2701ec9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/655d20ae-f0c8-4166-82fa-afb17515c1e0/how_to_use_swanson_speed_square_for_angles.pdfIn PDF document text
    • http://zagiwis.rf.gd/77629799188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644c2e48-1eb0-4367-aa31-6d502c9883b5/5193689182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978d7c6b-6093-4cb6-babb-73626f2bbe88/what_is_the_largest_penguin_species.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31796401-80ac-4034-b60f-aebd913a7788/how_to_verify_six_sigma_green_belt_certification.pdfIn PDF document text
    • https://2eb5e741-fe40-4e13-9a70-20af0821b154.filesusr.com/ugd/6cf56c_1e796b98f1d64a1b99457d17a1b56007.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c1451a-57c5-49fd-b925-c51d64058efc/list_of_seminary_schools_in_nigeria.pdfIn PDF document text
    • http://vegusofeta.rf.gd/widopadeza.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F8 5116 bytes
SHA-256: 7335613c7aa01347dd82816f722f9ecf00934b5e4f1f80e86307236ae2f78b47
font_01_sfnt_off00013872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13872 13764 bytes
SHA-256: 7d417cc302d6a1fa38748f53d1113ce9da700c43ebfdc16770711952873c119f

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