Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03725f5d2066c23…

MALICIOUS

PDF

81.1 KB Created: 2021-09-02 02:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0f42dce28556add5d52deb403febb23a SHA-1: eb6c4984964dd12a594e01d8bbec6126fe471bff SHA-256: d03725f5d2066c23de5fa3878629a75bcf60a3854384d8fdad882cad64b188f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to WordPress uploads on various domains, indicating a link farm designed to host or redirect to malicious content. ClamAV and ML classifiers identified this PDF as malicious, likely a phishing or trojan delivery mechanism. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's part of a larger malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/38ed5195bd2c9452ba84e7c4881c7ab9/83581818138.pdf In PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/80675653726.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/bezabibogotatudig.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/42389546007.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/97947795769.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb1a01feea---fuzupomagavoji.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/v946mmdv35ojt0gm1oqr32uo4a/99882065475.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/lewujimevodejaferawaja.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53c0441548---21730253493.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/9c34531264f091b4682d62c83c66ea74/30914366501.pdfIn PDF document text
    • http://www.smpnuenen.nl/images/files/bezorofurigufuwitobako.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/78425818900.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/54767245518.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/40045270552.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/negebod.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/wezim.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/28233349740.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ce800eaa9102d4c59df81f10629ff7f8/16348495131.pdfIn PDF document text
    • http://abc-tel.ru/data/File/16397478317.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/64499b588957cb80eeddf1568a771059/xodakuromuwukulepekomivu.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/75543694218.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/muxajugob.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/k80emkbn95l0kjll6lkk821jq4/gamufixopanumisinigoruz.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/26835606121.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1612bb2570b6d3---tapixotodukupuviso.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///zabedex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+i+extract+one+page+from+a+pdf+documentPDF link annotation
    • 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_off0000da30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF242 16368 bytes
SHA-256: acfef9a02ce59e8a48f8ee25ff2ef69b48f49253b7ee8961fc08e4fd85af14da
font_02_sfnt_off00011c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C83 11028 bytes
SHA-256: 8e27930f6ff2abb15702ee7f0be20c521c2fea26ea286a0ac1a898564b3f3f57