Malicious PDF — malware analysis report

Static analysis result for SHA-256 294521b7f9360f1f…

MALICIOUS

PDF

81.3 KB Created: 2021-08-16 12:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b94388ff8ebb051db349af1da931c5d2 SHA-1: 74b1057d9474988cc0e0f297f283f300f647dbba SHA-256: 294521b7f9360f1f0bda9a4f8781ac26b00093ee5aade2cbea16606ecf5d79b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be hosted on compromised CMS platforms or disposable domains. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://chcial.ru/uplcv?utm_term=market+leader+3rd+edition+intermediate+answer+key
    • http://christopherspubandgrille.com/userfiles/files/bupoderigelelefepisuli.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a40db1b158f1d3169b169cd5d8ab70ac/letopidujisadadikaguru.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b256549544a---jupoledarelugagenativejig.pdf
    • https://bibliothequeanglaise.org/upload/files/40592825740.pdf
    • http://leadingedgecorporate.com/user_images/file/98109059926.pdf
    • https://clap-bas.com/userfiles/file/lurakuzarit.pdf
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/lijowirawalogiw.pdf
    • http://botosani.ro/img/uploads/file/22722557621.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/161043f8f8c88e---mudezoridaramude.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c673c412f---nemunafakilaxuzupudovil.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/fe845149532458434f91141fb761a65c/banixubixomukasibidam.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/3p1a5sr557s618pgn6a5qppgch/vifereresedasowivejosi.pdf
    • http://boek.se/bilder_umeny/File/pifamuwobotiginokomu.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b3e4d288aa---20977632665.pdf
    • https://mygoaltv.com/ipp/images/uploads/files/37702134475.pdf
    • https://12shio2.com/contents//files/26532680069.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/1ca1453bc3cd21982805ddeb89197264/92835970047.pdf
    • https://menlopark.com/wysiwygfiles/file/fudadol.pdf
    • https://x-software.cz/data/file/38045964223.pdf
    • http://arcadia-fitness.es/userfiles/file/93953556927.pdf
    • http://clearspace-design.com/CKEdit/upload/files/zekizuvedapo.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/xedebumoti.pdf
    • http://bmcsteel.com/uploads/baiviet/files/zozonip.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/ce35efbbdf9d069fd60cf1a06c7ca457/80673213226.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_off0000d862.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD862 16792 bytes
font_01_sfnt_off0000f079.bin
84daf09bcc676ebebfb397618c92e7189155ebdd07c0109afa65dc93adb00786
pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 10868 bytes
font_02_sfnt_off000109ae.bin
52e43c7a1a71f39b1f9e8d58ecd0cf1618629745259775c9d38bed18e7a362fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x109AE 16956 bytes