Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c32ec42c164a1a…

MALICIOUS

PDF

79.3 KB Created: 2021-09-14 00:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bf9da701f5b1bd18af77d6b6310399e0 SHA-1: fb119a6aca0004d316812a604cb8354df44b46c0 SHA-256: 40c32ec42c164a1aa5aaab9904056323ecd8a856dd4b973d0a4e7c6f6256e2e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, a common tactic for phishing or distributing further malware. The presence of external URIs and the overall structure suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=pdf+to+dxf+file+conversion PDF link annotation
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161328abfe1c7b---makotugawisizitubumozel.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/89625582434.pdfIn PDF document text
    • http://bftt.marketsearching.com/upload/files/34831476118.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/kejik.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/simijiba.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/wozemuka.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/89247473668.pdfIn PDF document text
    • http://njxinbell.com/upload/files/zerulagipovagemume.pdfIn PDF document text
    • http://alcantara.cz/data/file/bapexoratiresagisaxusu.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/rigidem.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/vogesevigitefufif.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/ximegilo.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/gominesixufuxerexewitowol.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/49855996623.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/luwukum.pdfIn PDF document text
    • http://oembag.com/uploads/files/202109092218482644.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/wobekusipewiwatigipijad.pdfIn PDF document text
    • https://diphong.com/uploads/43161217496.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/11805607189.pdfIn PDF document text
    • https://alexspa.pl/userfiles/file/mifop.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/6132ff36551ba.pdfIn PDF document text
    • http://skupka23.ru/upload/m/85902333703.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161347863a23f8---xanusodilijebabepatuwi.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/95727152143.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/65886302723.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_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 16912 bytes
SHA-256: 384fbca86de4e05a4029abac8a6186ae2d53ed954603865971adef7b61262795
font_01_sfnt_off0000ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 10476 bytes
SHA-256: 5f2c6c6ef8c369aee3e8ed3076792edcee4e392bc609c3f67d7a30b9bb93e717
font_02_sfnt_off00011762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11762 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.