Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6966a9b9eedc0a…

MALICIOUS

PDF

76.6 KB Created: 2021-07-17 12:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5566b9dbec63fa4a334d883f6cd04db8 SHA-1: 55894f35d3165cebc07b42f77f2ce9a7169c7c20 SHA-256: bc6966a9b9eedc0ac954803fd01622357d85364c557216cdbbff1b0d38b693fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9de9b37127---lavifejifilemeluramekupus.pdf
    • http://kulturazebrak.cz/userfiles/43019760621.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/0e38ac06866892c9fb67d0309d984096/87845281245.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b843af527f6---60848567068.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/755dbdad3dc988ea5783cf67e5a302c6/3016266040.pdf
    • https://sproname.com/files/userfiles/files/xodal.pdf
    • http://dogoducthien.com/uploads/files/86238165147.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/bf80a2f00132827f042df917c4ca0e48/jebub.pdf
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/beguliwilu.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/rng59pq2l7498ss5ct7oopiskv/lobake.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/5ileva7pn9nmpqgdeak1hc89qg/90147977619.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607de514d0062---77655961173.pdf
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/7sqd5dimvoe21s0v8km674ub34/52574029295.pdf
    • https://anthonygillant.com/userfiles/file/zowejeli.pdf
    • http://huucodatlanh.com/userfiles/file/mekufojazid.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/beb3cfafe2ed8be519d82dfead63b2cf/lefewujekovizitetekonaduw.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ad487bee6---95467154206.pdf
    • https://secolink.sk/userfiles/file/gesodupa.pdf
    • http://dr-onesrl.com/userfiles/files/95296317855.pdf
    • http://cnmrobotics.com/files/files/80557740567.pdf
    • https://chief-moving.com/editor_upload/file/pifegojiferokejoradabiz.pdf
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14276234249.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47af8bfa02---fijixatusukepeku.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/9974173fbfead81cb53ae0594551727e/34112151128.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=easting+northing+to+decimal+degrees
    • 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_off0000c783.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC783 16792 bytes
font_01_sfnt_off0000df95.bin
43d9e685ab42272c24069ce131f113f4d1142d76fb609aa2b1dbb6db1d528908
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF95 17168 bytes
font_02_sfnt_off00010c9a.bin
ec4c5de82254bce383db05d6294a9770607e4baee171317ce45a46a267ce16fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9A 10800 bytes