Malicious PDF — malware analysis report

Static analysis result for SHA-256 afba1578d7e0503c…

MALICIOUS

PDF

73.5 KB Created: 2021-09-07 21:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6595f9a13bf12e4e13dc957989150c1f SHA-1: 0cc8a7e13d6759cdfbbea4c0f0a2a998c3379867 SHA-256: afba1578d7e0503c9b4c55b60224fddf7535e4d117404e5df817e970eada354e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=taranath+tantrik+pdf+file+download PDF link annotation
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/4mt9ktdpsen19bec52thf25luj/nabesipujidimegemolaxot.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/b32cb300d6314fb18e3884ff3936bbf8/95083688379.pdfIn PDF document text
    • http://artospace.com/pics/file/lilibufidosekewora.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/setajavapixaxagavosurexuz.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/6205271741.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0256597e---gegepuwin.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee061b6fbe---jadetajifawejevogad.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/43937781912.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/55190733611.pdfIn PDF document text
    • http://modern-pro.ru/files/file/67048730191.pdfIn PDF document text
    • http://stevis.cz/files/file/95294686425.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/52360018674.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/081429046865.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/nekomabekesoma.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a64a36a7b---xelukekozaludogak.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/menebu.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bda514f3f---58110818685.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/ravajepisafekudulumow.pdfIn PDF document text
    • https://hssanesteban.cl/files/94686870733.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/rekemalaso.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_off0000b9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9FB 17840 bytes
SHA-256: e55a0b0a002c4bfff07bac439a8367558f83e3524949f8399b1e9c99b76da647
font_01_sfnt_off0000e867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 10568 bytes
SHA-256: c2bce46d769b2486142e9669c66fe6a664512320410534e4f9492fd8701cd840