Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc9081a01889730…

MALICIOUS

PDF

86.0 KB Created: 2021-06-29 01:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1864abebefcbc80e520b7f9aa65c3e7 SHA-1: 46cd7ddb77dc8c630a7e58892bab106f8a150dd5 SHA-256: 2bc9081a0188973054c408bbe8cecf755eaef2d2cc2f2dd66d00987be984deb2
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://peneleos.pl/userfiles/file/76215439025.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609491300dc4a---49919428745.pdf
    • http://logtech.cz/foto/Image/file/53948354760.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f88b79c08---23699674928.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/h2cesfhshv5n4osvlhvtjqbb54/16470009030.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/rmmi2cfkgj8lgaukiv3pd931o0/xelasokewofi.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/17100939723.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c028a904799---63890291759.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160768a81528f4---litulorera.pdf
    • http://koreaseals.com/ckfinder/userfiles/files/tedogok.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/46506350bf943cc92b78a1a5a9fe6722/ziwuwovegepikisuwafijivog.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c147e0bc879---92390320085.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8515abc9ab---18455964290.pdf
    • https://clickkedai.com/userfiles/file/ruvuzovobukinuravuro.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/30d24013b72d58c755cbeb04cebf638e/87583523937.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/0a16449d556c3b9d8fa9e2a4423d70b8/siwukurenogesodabegu.pdf
    • http://cravaluos.com/ckfinder/userfiles/files/34667200900.pdf
    • https://syteq-pro.com/userfiles/file/rinebepomikaki.pdf
    • http://dailymaydemtien.com/userfiles/files/woxewerozokodu.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d747628e4---50588567528.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=grill+burgers+frozen+or+thawed
    • 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_off0000edf7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 16792 bytes
font_01_sfnt_off00010609.bin
c97a6291e2c1961366af285b9d92250ff46b0aec091b625c67a89b043c7c4289
pdf-font-stream PDF embedded font (sfnt) at offset 0x10609 16904 bytes
font_02_sfnt_off000131a6.bin
1979de6d674c2c480f896ab231d8845267691612aa9a46baaa0f4e9e47a83371
pdf-font-stream PDF embedded font (sfnt) at offset 0x131A6 11060 bytes