Malicious PDF — malware analysis report

Static analysis result for SHA-256 0536ecbe5affb3b2…

MALICIOUS

PDF

76.8 KB Created: 2021-03-11 22:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2740c3979bd185db25f0e34c1cb3419d SHA-1: 7799ef8973c8af8ef9a3515465b3d16d1b367dcb SHA-256: 0536ecbe5affb3b28cf4183f9907d8bfdaeea70716fb8c11acfe480ec2ff7147
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 point to other PDFs, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is dugedepap.ru, which is likely used to redirect users to other sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=the+expanse+books+vs+tv+show
    • https://gatakuluva.weebly.com/uploads/1/3/1/8/131856326/mugilaref.pdf
    • http://subaxidubuju.22web.org/credit_bureau_report_example.pdf
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/4085528.pdf
    • https://cdn.sqhk.co/pigajifaw/hgLhdic/wegunimu.pdf
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/385630aca7.pdf
    • https://cdn.sqhk.co/pulovafafita/iYiijeP/best_bubble_level_for_scope.pdf
    • http://domifonupesif.iblogger.org/70792153994.pdf
    • https://sisilodoja.weebly.com/uploads/1/3/1/4/131406442/xixeragunel.pdf
    • https://static.s123-cdn-static.com/uploads/4366029/normal_5fcd50c42c540.pdf
    • https://cdn-cms.f-static.net/uploads/4423714/normal_5fe64311548fd.pdf
    • http://susasami.22web.org/723609456.pdf
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/5079298.pdf
    • https://cdn-cms.f-static.net/uploads/4420448/normal_60463432d93f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9d1e1d9d-cefd-4fd6-a7b7-3a8fd13a3fd4/how_many_chapters_in_harry_potter_book_1.pdf
    • https://uploads.strikinglycdn.com/files/b8277323-2384-440f-af7a-c0b2549f5546/66539023511.pdf
    • https://uploads.strikinglycdn.com/files/3e4c0312-9537-4b8f-837e-ed28bca9a8ae/how_to_find_someone_address_in_perth_australia.pdf
    • https://uploads.strikinglycdn.com/files/73e96de7-3470-44b5-a361-1fca3357537d/buvobuvefisozumame.pdf
    • https://uploads.strikinglycdn.com/files/03e797aa-0231-4108-84aa-657c4c23850a/here_i_am_lord_lyrics_collin_raye.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_off0000f06c.bin
4d038506211eb0b5899467e5ee5227c7f30c98913805c3b3d72d442b51c0226f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 5152 bytes
font_01_sfnt_off00010203.bin
8db7276b4d62bd9b59534319ef879bb5cee4d983ecfcea05e36d6dfff4b03f91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 10616 bytes

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