Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80cfaf5dbc7ae44…

MALICIOUS

PDF

71.9 KB Created: 2021-02-12 08:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7edbfa9bdd8c80fef410046ddcd7878b SHA-1: a0794376d2e5d0525a16f3cd5e8a304b80a46654 SHA-256: b80cfaf5dbc7ae44e6b5bb68fabe1ec3ba327f63e9bef40556412b19e47b33e8
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The embedded URLs, such as 'https://baarspo.ru/wix?keyword=rwby+lien+worth', are likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://baarspo.ru/wix?keyword=rwby+lien+worth PDF link annotation
    • https://vuminuzatadabem.weebly.com/uploads/1/3/4/3/134311796/18f3b0.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/ajfsgdd/king_of_avalon_kvk_tips.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_5fdb60a211697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409619/normal_5fc6024396b13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472764/normal_5ff57d20a1876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402486/normal_600ddd468d543.pdfIn PDF document text
    • https://cdn.sqhk.co/wenudiwome/gegtGt8/3d_battle_chess_game_free_download_for_pc.pdfIn PDF document text
    • https://dodapufil.weebly.com/uploads/1/3/0/8/130813701/toxalevoxu_sudex_toret.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425533/normal_5ffcdb3d2ac8b.pdfIn PDF document text
    • https://cdn.sqhk.co/novimabe/iLgdhea/80541338325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_600eda315299d.pdfIn PDF document text
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/pajenosokapowet_lilisa.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/uafifHo/how_to_sharpen_mower_blades.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temoweboriti.rf.gd/4_week_look_ahead_schedule_template_excel.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 4728 bytes
SHA-256: 54f6800b3d57d1ef736a3c5debe3d12d8b3ecf1c4ec10c672ca5e243e3a6ab84
font_01_sfnt_off0000ef55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 10548 bytes
SHA-256: c7fde61b39e7db1a56789989ac1706b04c585065b57796409392c2a58a3979a2

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