Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ded358040ec664…

MALICIOUS

PDF

68.2 KB Created: 2021-09-29 03:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 55496fa38c805b885bb07523d2133e7a SHA-1: e0033dd491449028593e3ff1de21a258f7597d0f SHA-256: f7ded358040ec664f90187b291966da2e01b3ccfc9d718f64ccdefbf96cd8ff9
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link, a common tactic to deceive users. The ClamAV detection and ML classifier further confirm its malicious nature. The presence of numerous external URIs suggests a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pixomot.ru/uplcv?utm_term=cod+mobile+hacked+apk PDF link annotation
    • http://aquamedia.cn/ckfinder/userfiles/files/vilaxeseba.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/51747485134.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/78354209336.pdfIn PDF document text
    • https://cv-vezouze.fr/media/file/42542779845.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/57461309949.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/bolesisejagowurogonenam.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/52062226937.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/79927838673.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/gokedevagutitiropov.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/18232739240.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/fuvatavuvubufipufawa.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210917053115.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/45418598468.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/fobaju.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/28614128381.pdfIn PDF document text
    • https://krygina40.ru/UserFiles/File/gizubajajurifuta.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/62939022193.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/389986646.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/59718622414.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/rajivunizilotexevot.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/xoruganubuw.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/76250682278.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/zubeko.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/22334649024.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_off0000b0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C3 13824 bytes
SHA-256: ebec300180b0a844fcded1cc601bfcaa774bfaee4132841ba278c280fed629a1
font_01_sfnt_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 10572 bytes
SHA-256: 3dc95c630394036252b4d3ac3ad34187cf7c1767176a5d06b40bd2d780d6f610
font_02_sfnt_off0000eab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1