Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02be3cb7c951acb…

MALICIOUS

PDF

88.6 KB Created: 2021-09-17 08:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c8680748b06d382660f591b83b6eec00 SHA-1: 773ef740f30925a2f5cab5fecce785e733af3d96 SHA-256: f02be3cb7c951acbd3068666072ae2fcefc3e0667125831872c928bbf522a96e
146 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a distribution or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of UTM parameters in one URL suggests tracking for a phishing or download lure, likely related to the 'sardar patel book' search term.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=sardar+patel+book+in+gujarati+pdf+download PDF link annotation
    • https://fwstc.in/userfiles/file/jobezirabeviduvewijaxu.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/puvepolazuve.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/kexoja.pdfIn PDF document text
    • https://semut73.com/contents/files/lopumizar.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/suginasozolujomesaku.pdfIn PDF document text
    • http://irinabailey.com/upload/files/86359837481.pdfIn PDF document text
    • http://ridendo.cz/files/file/lowejotodudokakoxi.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210902_536EA0CA3B5BDEB7.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/87091219181.pdfIn PDF document text
    • https://dptech.vn/uploads/files/zudoxosoxupe.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142ba1caf9ee---21074651266.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/zelewulanolil.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/vitokafaxinanuxafevapeb.pdfIn PDF document text
    • http://huiking.cn/uploads/file/162229057521.pdfIn PDF document text
    • http://24cvety.ru/upload/files/18608821676.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/dikasitakavupelif.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-17/images/files/28666497297.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/23529505078.pdfIn PDF document text
    • http://edituj.cz/res/file/90185646380.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/reduxefa.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/bobazalokejutiloruxobok.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/mebexamabe.pdfIn PDF document text
    • https://tiemhoamo.com/data/dulieu/files/31854699047.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/takozuxowurosekefix.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/6464005881.pdfIn PDF document text
    • http://hasomedia.com/userfiles/file/69095981812.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_off0000f3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 18020 bytes
SHA-256: 3cf9666c2ca33e68ee4fdc7c0e3fc4472c59a04a5482a44b4cd30b341faa51e7
font_01_sfnt_off0001227f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A96 11128 bytes
SHA-256: 3b00cbf5f616e3401d567d72fa0c82329a6283c15089fb71eae388ca53a5a2ef