Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2450498d95c031b…

MALICIOUS

PDF

87.1 KB Created: 2021-08-16 10:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1867ae672dc8e20704e06b08ddb4dcf5 SHA-1: 6b57491d4ae5e540ceba75760f09d47136270b0a SHA-256: c2450498d95c031ba26988d813e48006b6ed9f7c5a1dc5fbc8abab9fcbe6fecb
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while numerous, do not contain exploitable content within the document body itself, which is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e7d0a0ee9---91254493650.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/7af0447acb332e616e506c7f9173daf9/vasikeberemivox.pdf
    • http://auxerretv.com/content/public/file/zaputitesiw.pdf
    • http://pphu-joanna.pl/fckpliki/file/nenitofogonopinux.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0dd13ba3c---30650559114.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9498aaf59---vosotamujegixivafuvopila.pdf
    • http://etenindex.nl/images/uploads/56598183390.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609072cecccfb---95185091302.pdf
    • https://fizjolech.pl/userfiles/file/manupexadipeg.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/526a63e22c53e39a56e69a68903d4af1/munoxavajaxexufijikazu.pdf
    • http://brcassociati.com/userfiles/files/9861797958.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/2s26ooaoraqtp6sfc24bak12n5/zeboginogibuwijak.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160953c2ca0fa2---45748570472.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/8d80bfb3628e5bb3ef699d8e709e853b/35124038886.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a703c1aaf30---81244482405.pdf
    • http://interstroy96.ru/uploads/files/63498029957.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/a0a8356ba0f083b277413c88f5ce7a5f/15516324987.pdf
    • http://shengnabei.com/uploadfile/file///2021081212315799.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ga3khkcj8a76hlrlmgvjse9ijs/65772265874.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/93bfbbf485092bfd2223ef19228a08ba/53201391391.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1eefa31aa2---48025430643.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/d7827e9262d5dd30d538074e57c8cea5/tetizebu.pdf
    • http://vrieshorst.nl/images/uploads/file/pujonujijimotapimo.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a669d9dce53---8410495470.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=tom+and+jerry+movie+ticket+prices
    • 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_off0000ef71.bin
da0cd97831749718d2a1280b95d5b72f2e924b8f96e513142cf375f8528893d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF71 10992 bytes
font_01_sfnt_off000108f8.bin
4011e901f220fb4a45a7980899dde8aa79e136061b936e66e44d3b1fe922765c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F8 17544 bytes
font_02_sfnt_off00013633.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13633 16792 bytes

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