Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab46cd17d6e2d7af…

MALICIOUS

PDF

172.5 KB Created: 2021-07-19 19:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 08e9872b2abf4a4441dd34d79d29f68e SHA-1: 71f180a89b56fd99b685f23be4ebec05f0f1ec3e SHA-256: ab46cd17d6e2d7afbcbcbd5bb3125dc0aacb2fefe347956b41f5ae596b8eff1b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to host or distribute malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b11d5642d7---76561571815.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f7fbb352e47ed25004e03928a76adfb0/23417181001.pdf
    • http://sungsam.net/userData/board/file/namojigegomekiretewakiki.pdf
    • http://eau-msu.ru/ckfinder/userfiles/files/77051799443.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b47b81999e9---75120230819.pdf
    • http://alimentosldm.com/userfiles/file/15529381782.pdf
    • https://kurek-rowery.pl/user_pict/file/kejedavokifaboxuxifoz.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1b77474c---dizuwixurejimozukurupi.pdf
    • http://valaptop.com/ImagesVA/file/topijeliwazamijamomopavo.pdf
    • http://suttonoakfarms.com/clients/880813/File/xudixewogun.pdf
    • http://seanmore.com/userData/board/file/sojukal.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a279473c68f---libamusomaxizilonu.pdf
    • https://burgas-remonti.com/userfiles/file/mimaludivatejef.pdf
    • https://catbasailing.com/upload/fck/file/lirenedonumonutejaxezid.pdf
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a7f586a4b3f---fudelufi.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/dee7bfaca02ded397b9c970c00ba975d/puzibufodikofanikok.pdf
    • http://www.tiande-global.com/ckfinder/userfiles/files/konomu.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070a7b3b878b---87034088699.pdf
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/43909815216.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/q5vu836abq9d7m1cs3f5u4on2v/rarofuvonetewi.pdf
    • http://oresteruggiero.com/userfiles/files/6655294347.pdf
    • http://pspectr.ru/userfiles/file/13788738921.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/8f4f1fcc048daeca757306c187c215f0/929055483.pdf
    • http://magogaralbamoble.com/galeria/files/deragugizofiwojuku.pdf
    • http://advicetao.eu/pictures/file/3467612607.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=catcher+in+the+rye+year
    • 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_off00023ff8.bin
cee517bc9e4a2aac63b274163d0b5373e449085b59c0c0d07d12c08be8ed3cb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x23FF8 10140 bytes
font_01_sfnt_off00025699.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x25699 16792 bytes
font_02_sfnt_off00026eab.bin
cad2cde364a533a7b78e0ac1e41381366c43bc7fa57a1effcc7ae18837cf8f65
pdf-font-stream PDF embedded font (sfnt) at offset 0x26EAB 21068 bytes