Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df2a216bd6e7693…

MALICIOUS

PDF

83.8 KB Created: 2021-09-12 06:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: ed2ec9af3ad836c3c48d71c58853b94c SHA-1: 040a38792d43032a436360d9faca6bc83c01446c SHA-256: 4df2a216bd6e769326508b0f6b9746f39097c90218320d322e586678c99489e8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, with one prominent URL leading to a site offering a game download, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF's structure and embedded links are consistent with a phishing campaign designed to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://inwebjor.ru/uplcv?utm_term=grand+theft+auto+v+android+download PDF link annotation
    • http://phuketdriveschool.com/userfiles/file/75515165328.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/43040376714.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/31216406517.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/4086076887.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/lazat.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/nijivotilekune.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/xatadijimul.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109050103451653.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/25506534941.pdfIn PDF document text
    • https://springkasteelhuren.be/userfiles/file/pimomonasenazum.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/jutiwedakalanipukenigenig.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/36429798622.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/31774821808.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/satuzig.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/nelopozilezu.pdfIn PDF document text
    • http://progettocecinacuore.it/writable/public/userfiles/file/vuzowawasatimerunetizuw.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/7625698264.pdfIn PDF document text
    • http://uralteplostroy.ru/content/file/93952597641.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/38875521631.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/400284749.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/53026828887.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/81610813197.pdfIn PDF document text
    • https://altstudio.be/app/webroot/uploads/file/vojamizilixixititevumenig.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC62 10572 bytes
SHA-256: 568c154a6a1f64d7f2bd8f6e34ad70a0ac2cc4603999507c0552afef646cb826
font_02_sfnt_off0001147b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147B 17664 bytes
SHA-256: e1a91a2fa71dccaf73a1e3e40258b24208b59f176e41bce28f80abcbd6b716b1

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