Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a8f8cc8a4fa094…

MALICIOUS

PDF

102.3 KB Created: 2021-07-19 00:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcf1f7f0e48db58165fa9a762d722695 SHA-1: 93375c4d08e0a1d6aa7da21f9d335b84a6d24cd9 SHA-256: 82a8f8cc8a4fa0946ddd518935bf4091326bfa17118d7e61321be2bae933e337
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://bangprice.com/bangprice.com/beta/cms_image/file/netigamotakamajanefi.pdf
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/256836517.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a82b3a289cb---6673979572.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/v0sm78pq7sqo3rbum6c5pku3h7/femukiso.pdf
    • https://digireg.pl/upload/ganotowufofenuvo.pdf
    • http://backkwang.com/userData/board/file/maradomizaxanivenemasin.pdf
    • http://agataklimowska.pl/userfiles/file/83671274213.pdf
    • http://ylpcl.com/ckfinder/userfiles/files/jolujepuxilifejomutu.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/3c9060c8167bb7ed6f4ab812d63acba7/95131176547.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/de5e6d3cbe16892f985bd8f25d5f5b32/49668035971.pdf
    • https://securitydm.com/slicice/file/18606119849.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/h0s6iaqs2qsgv048h9cr05eakq/13732876088.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/38db7da283a271366548cb2157fb344f/55748198181.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbc5928ebf---3623455855.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b829c8149d6---betogituzigidiligiz.pdf
    • http://gayaarchi.com/userfiles/file/20210626051657.pdf
    • https://tskrea.com/userfiles/file/pifuve.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/b7b1ca1418b7f1592c2b01e2dd41c6e9/tusidonogudiremife.pdf
    • http://oilmachineydy.com/d/files/68123468634.pdf
    • http://studiodabo.eu/userfiles/files/51635055295.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/k98g8h4l5qlr0v1mtliknkii30/xemadenenaxumowajuxogef.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160813560dc7a4---47594608382.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc1ca8cfce---75087139454.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/c9162ae0aa61825f61fffa505e824c97/99652146835.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=the+bbq+house
    • 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_off00012fef.bin
de8b6f432e57ff0a39337e17c6f2b07a1f5503d1c8612ed1d6652a587e95abc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEF 9952 bytes
font_01_sfnt_off0001460e.bin
a3e0e13e04680940fb107d662f4a967eed374510d7eaf1cfc5347dba79cb1d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x1460E 17632 bytes
font_02_sfnt_off00017423.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17423 16792 bytes