Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbeb22fabf5fed5c…

MALICIOUS

PDF

82.4 KB Created: 2021-08-06 18:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c2faf64b1b96d97c0ecab6838230e333 SHA-1: 9222c2b1f60b8b9f78d455df678c3ca90d736cf2 SHA-256: bbeb22fabf5fed5c1a8b14fae08313026d2aa4d00b4f4bd6556362b45b028f5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://queure.ru/uplcv?utm_term=tag+with+ryan+game+free+download PDF link annotation
    • http://www.cddfct.com/up_files/file/pasamiregirujeriwesejovi.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/31205057049.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/da76dbc7739cfe3ecea73d374af2887f/tizanijitaz.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/muvidolitekutumunadu.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/92610971369.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/wipodalafasupa.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/likijanalevibawure.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/64458573251.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/tovasufenuwogivilupep.pdfIn PDF document text
    • http://hrudolf.com/userfiles/tuxedusabulukudomo.pdfIn PDF document text
    • http://donghotam.com/luutru/files/nifulem.pdfIn PDF document text
    • http://demkapi.com/resimler/files/dakuze.pdfIn PDF document text
    • http://toicodonlyson.com/uploads/files/nakavexazo.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/powenedevimoxubotodumuwe.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5db5e4bd38---juwitejanob.pdfIn PDF document text
    • https://ksboutlet.com/file/files/64080951184.pdfIn PDF document text
    • http://www.hcc-cpas.com/siteuploads/editorimg/file/dasinetenumuxoja.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/16017799290.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dca8a95b940---vewop.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c72a468cdc---vetitunezilijagobuxofok.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/lilapemufo.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_off0000ded2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 17156 bytes
SHA-256: cd7dc1f849694a58bfea84e22c7724f9fe044cd0ca901efd7ceb769a02ffa5ac
font_01_sfnt_off00010b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B75 10796 bytes
SHA-256: ba2f117165888f5f1233a2d13d7bdd24b0535d4cc18557b5ab54c4b3222e57f4
font_02_sfnt_off00012402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12402 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1