Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60853012010f577…

MALICIOUS

PDF

74.5 KB Created: 2021-09-13 11:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 3308a5fbb611408e7387069a6ad3016b SHA-1: 4fa0aa89e78f5d47c90c27caefb8304d401982b0 SHA-256: d60853012010f57771f7ce131b808e8d819cd976a34c6609f7c25bb5e3509eea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://irlanc.ru/uplcv?utm_term=the+world%27s+hardest+game+cool+math+games PDF link annotation
    • http://fvv-hohenfelde.de/sites/default/files/files/xezobupix.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/tugasax.pdfIn PDF document text
    • http://ozdermusavirlik.net/userfiles/file/midesinilenevuzusunu.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/68817555552.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134eaa211ddd---xelomuvefufobibejogul.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/pudire.pdfIn PDF document text
    • https://tutorbolivia.com/userfiles/file/2430095011.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/43525469404.pdfIn PDF document text
    • http://detectiveoffice.net/userfiles/file/lenabumopubazonefujakuv.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/f94167145a699d8e8d5d747b3f336a05/linijovufevu.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/ralabapaxidibobevewupojir.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/19284693011.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/pimozoto.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/fusopaturewugiselafuwikav.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/64565554678.pdfIn PDF document text
    • https://corpeverest.com/ckfinder/userfiles/files/desudajozijisegaz.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/41207803761.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/norovunojojupulunuxebi.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/rurebesawamugudipewa.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/menukuduvexiliduxamekiwi.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/35351472362.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/rutaxaruwewa.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/kulugipalijevoxex.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/xawiwuvukado.pdfIn PDF document text
    • https://ccskin.com/geektic/files/87267140166.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E9 16748 bytes
SHA-256: c272297a59d544a32606457091a2d8f52df525fd00e6b343f753877f496543e0
font_01_sfnt_off0000eba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 10704 bytes
SHA-256: 47e17361be9297e28b9274b8cb93e03793890963fc261c48e36cebffb149974c
font_02_sfnt_off00010432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10432 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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