Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9ad80c9247fe49…

MALICIOUS

PDF

73.4 KB Created: 2021-09-02 06:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c00cf6b970d7a56dc355f12a260abb3 SHA-1: 0d29ccb3a7b95909319948caabd94ac9cdcfb815 SHA-256: 3c9ad80c9247fe4998b54e0c79703252e28c209c615b4748083b4b5ae46bf4a6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The file's structure suggests it's designed to redirect users to potentially harmful content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6661

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://pistant.ru/uplcv?utm_term=jumping+jehoshaphat+meaning
    • http://martom24.pl/martom/userfiles/file/81055513371.pdf
    • http://jacksonreunion.org/clients/71346/File/29490686261.pdf
    • http://yossy.biz/userfiles/file/20081090781.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5da0437216---97419738282.pdf
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/sufamipekaponemo.pdf
    • https://tenekedjieva.com/uploads/file/87975800516.pdf
    • http://unseenadventure.com/userfiles/file/kaxagofoliwinunisagu.pdf
    • https://wecareu.net/ckfinder/userfiles/files/10683075459.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ef8270314---38739275806.pdf
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/remuretezotuba.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/1e05fdde726122739eab0917d3dbca7a/ralikuvopolifebura.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075ba875e0ed---94897818130.pdf
    • http://promador.pl/userfiles/file/depasoperikaxoxipibave.pdf
    • http://edumedcare.pl/upload/files/pubegoxopomenoxonusezijo.pdf
    • https://organicfertilizerproduction.com/d/files/gunawozifapote.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d35f8271c18---10162647263.pdf
    • https://maintogelonline.bet/contents/files/loxepulo.pdf
    • http://aimic.com/userfiles/file/pegakuba.pdf
    • http://aivieksteslaivas.lv/userfiles/file/kafirovuxevosevera.pdf
    • http://doudou.tw/userfiles/files/niliwitizeguf.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/602e0b445105b72bf95bd673748fb053/50103117279.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/i5c2hgb0cpp9nh3cp0j4dq9i67/zagalumoxik.pdf
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/fukej.pdf
    • http://botosani.ro/img/uploads/file/zegupomobitozob.pdf
    • https://daquin-ferriere.fr/userfiles/file/navafifu.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d208.bin
e16003f5bc794eb04912144ca2eee166959774753e0170025ad9271c7d9590cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD208 10776 bytes
font_01_sfnt_off0000eaa5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 16792 bytes

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