Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee3a0db93193890…

MALICIOUS

PDF

81.3 KB Created: 2021-09-21 02:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1f6161699622b1c78df26787b515c8a SHA-1: 411c555442f55aa3a1b73423d57f00f9feb5f494 SHA-256: 9ee3a0db9319389038cfbc4e88f76f182b98dad732939be2dedc00816c1d5523
164 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malware or lead to phishing pages. The presence of a 'download button' lure further supports a social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/uplcv?utm_term=hitman+2+silent+assassin+apk+obb
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16144d13f26ec6---tidikumafex.pdf
    • http://ippon.lv/uploads/File/redarusuzejej.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141622771371---84195386296.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1613f565242dfe---92152231343.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac9c92af24---pogizozifek.pdf
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/dakapekaberukutufefonoz.pdf
    • http://boldogelet.hu/media/15223302114.pdf
    • http://macro-e.com/app/webroot/userfiles/files/36500809526.pdf
    • http://uniroll.pl/user_images/file/jixewugoviluwudur.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea62766d87---watetolusibifodiwevuk.pdf
    • http://albergocavour.com/userfiles/files/89299162901.pdf
    • https://samavetpharm.com/userfiles/files/kazetumuvuxusitate.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/161357485999cd---dumikid.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16140e7dd42e59---vixiseti.pdf
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/19175824185.pdf
    • https://alpinashop.rudy-ra.com/files/nusozepupujugolovarev.pdf
    • https://unaizahic.com/Files/files/pitemideradexol.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614459f5db877---86623201070.pdf
    • http://alpha-cp.com/userfiles/file/dudorigotazagubopake.pdf
    • https://wemservice.com/ckfinder/userfiles/files/wezigijodapivadozi.pdf
    • http://dintainoodle.com/uploads/files/93640525252.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E4 16792 bytes
font_01_sfnt_off0000f1fb.bin
3702f27d4c9af54cc9e7dbf89ad87c0d5a1c0b2867ee5619190a151977c2b152
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 10656 bytes
font_02_sfnt_off00010a25.bin
d5d62ade3011cef5455de1d73f003b93cb0d40a5a52300d5f9ca07c90b845be3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A25 17548 bytes