Malicious PDF — malware analysis report

Static analysis result for SHA-256 2395987dc466a262…

MALICIOUS

PDF

123.5 KB Created: 2021-06-26 23:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ede5dd6bbb67353a01e9a96d526f024b SHA-1: 89a96d4859f9169a0bad74b700232b9fc5c97649 SHA-256: 2395987dc466a26227dc08a08b52e99d0f8db02d86dd976359456cee2ab6a401
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081bf2fe35b3---weferebuvekovojonolugogon.pdf
    • http://ideas4mypool.com/userfiles/file/74938191934.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b36a65f7c0---38125333463.pdf
    • http://macautemple.com/userfiles/file/kilimawukilajejesoxovovod.pdf
    • https://xo-sound.ru/userfiles/file/sisizere.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/v957dnq4ie53cfc1d7ussc7s44/fesosu.pdf
    • http://czdashan.cn/uploadfile/file/2021050221281973499.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/0fs9mhk2b7s519b3mt4m6do7b5/87492249960.pdf
    • https://bursakaynak.net/userfiles/file/7028911114.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a0b8ecb97c66c2585d87cc32481eb3fb/82115952624.pdf
    • https://hmanagement.net/userfiles/file/91659581318.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ujmmklj0ukhabb6q12101m8dq3/70470131339.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/83cc2a418e42b22f36d191dce77c24f2/8727450276.pdf
    • http://samrayburnclassof1980reunion.com/clients/873185/File/tawufe.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092f6586bba7---89771739370.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a22dd3076---vumafaratikonukoxazubus.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160831d70c943d---50274337819.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/bf894e3a6a016aaf17cbb5b5c4566671/vulubilimiguwakofik.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c5fad2f70---18012938412.pdf
    • http://lindseyderence.com/userfiles/files/98756743968.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966828dd064---46835611149.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a45dd301f---72605003882.pdf
    • http://npi-management.com/ressource/site-image/files/57377166408.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=lord+of+the+rings+1+free+download
    • 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_off00018067.bin
4bf4b74b44c44d24156cde3e5f4314c97abc473d424304190988dbaa6a29a30c
pdf-font-stream PDF embedded font (sfnt) at offset 0x18067 10728 bytes
font_01_sfnt_off000198e0.bin
9a7aae723ba0286776c1f63e20059f1f07084b01c07e9e6a080460ac10eaecf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x198E0 18196 bytes
font_02_sfnt_off0001c8ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8CE 16792 bytes