Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c25cdc8b631919…

MALICIOUS

PDF

91.7 KB Created: 2021-08-10 09:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f6cabf76cbab5ca5b6d296b91194583 SHA-1: f54ad77990a260b465f68daf71be82621e891ba8 SHA-256: c0c25cdc8b631919cf2c8f37ddca2797f04862eed49dc7721520b6c32b86e5c8
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cobe-ing.it/userfiles/files/kogevafisakel.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/96bc02034e08b2dd068d2349c2f7d6bd/36002653944.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/kf79k78n4obo4jveosc5kak0d4/36221768499.pdf
    • http://dainindo.com/Uploads/userfiles/files/xesolabawu.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f123d0061---rodijesulugenoxonifiki.pdf
    • http://espressoperfetto.nl/app/webroot/files/userfiles/files/mapevivumit.pdf
    • http://christschoolblr.in/userfiles/file/99854640699.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096aa6ad9bcc---suxexemuwurudumo.pdf
    • http://jaika.in/images/documents/files/ribezufasin.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/4d804aqgocg052llgeje81kit4/lejaranetoner.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f12461d123293c23c79ec1e12cec00a2/51226140236.pdf
    • http://miet-boot.ch/images/uploadedimages/file/vafazotafe.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0527419f42---10337094493.pdf
    • http://salocchi.it/userfiles/files/54351047570.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/4f332ecb59f6645b721ac51c36f3a623/76280708027.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2ec8b99eb---kepogipizuv.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/f4a7f60d62605e5e49315b9ef927e3fd/jorixaxopezoxisodef.pdf
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/68330212107.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f22bc8de1---86023115070.pdf
    • http://mayinluatudong.com/uploads/userfiles/file/fetanodukulukojiriluvug.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16072519069beb---lejiva.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+play+fortnite+on+android+unsupported
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 16792 bytes
font_01_sfnt_off00010495.bin
edcffbc24e7cc55e216e59b7d67dcd813a6a1bebb6b1f21584141b8c4c0cb0d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10495 17040 bytes
font_02_sfnt_off00011be0.bin
f78530a6a02b989f166248fcc4434d38aed342c040e1239765f957d66d27b52f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 10784 bytes
font_03_sfnt_off000134e0.bin
b4bd857f3876a0470d1c15bb3505af91006d9ea4d30eeb7a9ed6da6896c48ad0
pdf-font-stream PDF embedded font (sfnt) at offset 0x134E0 16896 bytes