Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2849bfd72aad7f…

MALICIOUS

PDF

74.2 KB Created: 2021-09-09 15:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 7734863b67df9f0bc7cf6f198ffe9590 SHA-1: f8863c9356d9e80e9e4d0cb4d4ccffddb69fc08b SHA-256: ce2849bfd72aad7f5b5c8988a8df650be970690b2f80d215bdd82f62312ba456
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farms points towards a tactic of distributing malicious content or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=god+of+war+psp+rom PDF link annotation
    • http://orzo.cz/uploaded/files/fivogavoxedonoxavokad.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/namipesufisiwagominixev.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/pimusutix.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/rurezebizinime.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/94516876114.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/59660844147.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/77449449008.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/pobetebotomikukiwurimoles.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613328d13bf67---14358501682.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/35217117300.pdfIn PDF document text
    • http://kammed.com/userfiles/file/fefexibepadogir.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/wulitunidupegetezewowido.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/zelomije.pdfIn PDF document text
    • http://fotosvatba.net/userfiles/file/pareburuzuwida.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/mapesedazazosora.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/99356154901.pdfIn PDF document text
    • http://autoachtercamper.nl/userfiles/file/73998446948.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/38036233860.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/7e3095bc193a764aa1e6ce6e4e81a41d/vajigireparavupaleje.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/23502527622.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/74233010130.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138799644cf2---30906085375.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/50996553239.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_off0000bfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC1 10312 bytes
SHA-256: aa2b287f98725098f9b45ab88aef9cc537bc03e3e4462c0e95868304683cb536
font_01_sfnt_off0000d717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD717 17100 bytes
SHA-256: cb344e1eb6f087456864eb5cf7f85b38eaae1d1dcdedc101b0cdfb676b8d3e80
font_02_sfnt_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1