Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ade454747f4e68…

MALICIOUS

PDF

77.8 KB Created: 2021-03-01 08:38:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6e8e9a62c47b7b0d4889f3cd333f4193 SHA-1: 8f75327ab73362df6033625ea7951d0b9e09200d SHA-256: 41ade454747f4e68fe6e49770875db6316f6697139f0c5579a21956f5ef055f8
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF_SEO_LINK_FARM heuristic, suggesting a tactic to manipulate search engine results or distribute malicious content. The presence of an embedded URL pointing to 'gimoguvi.ru' further supports this, likely serving as a lure for users searching for specific content like 'blocky cars online apk unlimited money'. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=blocky+cars+online+apk+unlimited+money PDF link annotation
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/nuvemom-kedilatonu.pdfIn PDF document text
    • https://xetuvamabur.weebly.com/uploads/1/3/1/4/131409037/nisupetigoxesuzeko.pdfIn PDF document text
    • https://niwejipudid.weebly.com/uploads/1/3/5/3/135383293/9216211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379960/normal_5fdef753135eb.pdfIn PDF document text
    • http://hopecommunitynaz.com/67689794608nb3rq.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/Rrk4jiJ/starlink_battle_for_atlas_ships_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425760/normal_5ffa155e19ddd.pdfIn PDF document text
    • https://cdn.sqhk.co/zubejavaxuvu/bJ8AtiK/warimetitevixevunuli.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/a3sZbjb/through_the_ages_game_board.pdfIn PDF document text
    • https://lumosezuto.weebly.com/uploads/1/3/4/4/134499790/392627.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/41256381540.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/vapimunumuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/gesevuredovememalimereb.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/go_math_florida_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/eulogy_template_for_son.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/wallpaper_engine_tokyo_ghoul_mercury.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_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 5436 bytes
SHA-256: 29c1d4a6908e231d7e22c53c5012749712b4b2238309b725897448ca59c372c3
font_01_sfnt_off0001052d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052D 10852 bytes
SHA-256: 8e7aaf0db6423b208fc08e957ec8f63d90dc312c6b023f392b69f16c226f4bfd

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