Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc2c34be1c763d0b…

MALICIOUS

PDF

101.3 KB Created: 2021-07-14 08:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8fb906f35bbc2a1096e4374167130d13 SHA-1: 5b046edef8b4c82a691b284fc74ee4ff84d60d14 SHA-256: dc2c34be1c763d0b40ee3097da5df717e4d42e1efb61eb854a7395997343fd4c
156 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 for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories. These links are likely intended to lure users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2925e6bf3b---lelisupunezakuxuta.pdf
    • http://barnesfamilyre-union.com/clients/52050/File/bupevomevebefiwafuwiniku.pdf
    • http://syuncyoku.jp/upload/file/3533174740.pdf
    • http://pnmanagementsolutions.in/uploads/84707473336.pdf
    • http://amindoost.ir/images/upload/files/xowupemugawuroj.pdf
    • http://lyzjkgm.com/d/files/kigaxe.pdf
    • http://buergerforum-tirol.at/file/biwewapikopadesotirude.pdf
    • https://am-system.eu/ckfinder/userfiles/files/54907710843.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba352a152ed---zaxevepufen.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4dbc55514---wezonuro.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4ac308f89---xefenupe.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/80pcegak5c7dib17frac5pa2kr/xipeno.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/bismala3m32989jdgbb3vkorfh/dukadujopasepalel.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/v1v4o3jav8pf9gf4stkcj1plr7/21303303333.pdf
    • http://studioboscono.it/userfiles/files/posuxegalexenutifi.pdf
    • https://protectname.xyz/whoisprivacy/userfiles/files/wamizipuzisadumo.pdf
    • https://nanosoft.mn/images/content/File/goguxa.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c013832bab5---naziviraluzezafixadet.pdf
    • http://www.sec-ollivier-associes.fr/www/upload/file/jebenazipikamiboxolagese.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/1f8a78693bf4b2f873e4205573f7a582/72148631065.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/4b7rnm4ficn9kefr1kg0nmfd6j/regaxabu.pdf
    • https://go2germany.ru/files/file/vesoleba.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/95353cf05bdc9bd0bab711492ba4932d/32136424236.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+meaning+of+mariah+carey+epub
    • 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_off000126e3.bin
9ba994f05e5f4ae6dac9ae543c890d8cabd754ae6e53bf5003c257832c2d2aae
pdf-font-stream PDF embedded font (sfnt) at offset 0x126E3 18168 bytes
font_01_sfnt_off00015578.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15578 16792 bytes
font_02_sfnt_off00016d8f.bin
661962226c8f4ddbf3d9447d05352cf53f0cc7c06bcd07f67b43297123e9d234
pdf-font-stream PDF embedded font (sfnt) at offset 0x16D8F 10932 bytes