Malicious PDF — malware analysis report

Static analysis result for SHA-256 2201c6f928bc4f79…

MALICIOUS

PDF

78.1 KB Created: 2021-03-19 08:08:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a6fa045a92c1c2cb949086f596e1e22 SHA-1: d8583349c80726295f32a1e17de9dabf0bbd866c SHA-256: 2201c6f928bc4f792b144189626254eebf413d6cb6b2219b9d567d38f318198b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The presence of embedded URLs and the overall structure strongly suggest it is designed to redirect users to malicious sites.

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://seumenha.ru/strik?utm_term=is+this+is+where+it+ends+a+true+story
    • https://cdn.sqhk.co/zuronenom/f0jh3X4/gebilevaxoja.pdf
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/sunovudu.pdf
    • https://duvigenusidila.weebly.com/uploads/1/3/4/7/134736387/puzewutinaziwazid.pdf
    • https://zuzilumapodebaj.weebly.com/uploads/1/3/1/3/131382406/buzez.pdf
    • https://wedemewimobuxet.weebly.com/uploads/1/3/4/3/134309086/jodeweg_revopef_getanineludo_bijiperusivif.pdf
    • https://renunuvejo.weebly.com/uploads/1/3/4/7/134710344/gifagidawijuxesakow.pdf
    • https://static.s123-cdn-static.com/uploads/4461773/normal_5fcd0b5dd980f.pdf
    • https://cdn-cms.f-static.net/uploads/4389361/normal_6015407558ec0.pdf
    • https://jafoxexaromomev.weebly.com/uploads/1/3/5/2/135296472/dec7bf7.pdf
    • https://cdn.sqhk.co/javeduner/9JHhhk9/zosizojemutiworuvo.pdf
    • https://cdn.sqhk.co/wodaximewule/ei5higf/terrifying_deep_sea_creatures_scary.pdf
    • https://wozuxepu.weebly.com/uploads/1/3/4/4/134478893/d484db.pdf
    • https://cdn.sqhk.co/repudodo/12jccgg/dwayne_haskins_college_team.pdf
    • https://bovoladimuva.weebly.com/uploads/1/3/0/9/130970023/bb86ad91c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_bcdb16711b0c49eba81f851a19f1b71b.pdf?index=true
    • https://ff5ab256-a407-4697-91b9-141751226614.filesusr.com/ugd/4205e4_794c4797f81949c9bfec5a1f926f4dde.pdf?index=true
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_779718e0abb346b88e7647be8155c18d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0e0cf5f2-dfc7-421d-a54c-19cf9ae6881b/how_does_the_book_misery_end.pdf
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_75eae18ff06c4a44b3edabd7371ce90b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2729bd50-f246-436f-afc6-119d33692af6/how_to_write_a_basic_script_in_windows_10.pdf
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_8b02b676e6054fd5a20f1c0fc8891fd7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5009a499-1e6f-4f3c-8173-280f949b6616/kibiwoxeju.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_off0000f41c.bin
3e486035fd2542e6bb278852286783b913e278fb66467fb043b87834e4dd4975		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41C 5012 bytes
font_01_sfnt_off00010535.bin
a11c52e328c37bb4261e64c62c0ca4b80d69fac6dac8ff22860b4150c1f6c283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10535 11216 bytes

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