Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc06b673ffa84667…

MALICIOUS

PDF

81.6 KB Created: 2021-09-24 04:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3826d10b3e90020a59e66d526b3adbfb SHA-1: 7834087529492c72d8dd92f7a4ff9191c6c292fe SHA-256: cc06b673ffa84667a5f3d2b9a4def66815330cb5e1da8e330af0d455c1a27e82
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and embedded links are characteristic of a malicious PDF designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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://smidgel.ru/uplcv?utm_term=gta+san+andreas+gta+v+mod PDF link annotation
    • http://boxerdapolenta.com/cmsimple/images/file/gusupokesepusadexifen.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/kinedajabubukefupixiwinem.pdfIn PDF document text
    • http://geometracosentino.com/userfiles/files/nedezukenofefivijunuse.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/15355216521.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/61417538234.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/38f72aa32a98fa79ff4e2be3e64bed0b/baloteraluzeje.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/kuviteguru.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/suwovezawofanunitikobolo.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/87628643238.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/10530082294.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/72756270021.pdfIn PDF document text
    • https://leeleather.net/userfiles/file/404946703.pdfIn PDF document text
    • http://ihanzao.com/userfiles/file/20210908164606_538095808.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16145203429073---39132831318.pdfIn PDF document text
    • https://baoholaodong24.baohohoanglong.com/userfiles/file/mebobuzokenusa.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/37970692064.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/94181467306.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/dalogigoxuwawisuzoxi.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/vexojizobozabib.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/lijuxakulivodupoterunaral.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/zixazarasag.pdfIn PDF document text
    • https://somogyplusz.hu/files/40110240845.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/70241004377.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/62293251881.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_off0000dc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 10560 bytes
SHA-256: 2e71a0fe0394ca7b936e6feebe4655d1ecce77edf378aefe67277a60f7367d5b
font_02_sfnt_off00010c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C34 17216 bytes
SHA-256: 781a2f5c844944ef4ceedfb60942d08d762daac8922eaf01dbf7bedf1591d8e1

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