Malicious PDF — malware analysis report

Static analysis result for SHA-256 3592fb971f902a12…

MALICIOUS

PDF

82.6 KB Created: 2021-09-07 13:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe7981fb4496d3b808c4f119a6f676a6 SHA-1: 72a80b14b71264d0b005610c4510b6f2cc293bdf SHA-256: 3592fb971f902a122026bfd581b6dd10f9bcd670fe595f6c1e291c4786c309eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://drafthe.ru/uplcv?utm_term=holistic+pain+management+pdf
    • http://xn--hy1bt45apoap01a.net/jangheung/userfiles/file/gafoti.pdf
    • https://deltarents.com/upload/ckfinder/files/bavixaruwakejiguvizejiza.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160d68abfd5b2e---zutadavalipotes.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a381e123c5---97626907754.pdf
    • http://bielwod.com/userfiles/file/kidijizapolapov.pdf
    • https://eviinstall.com/userfiles/files/18510453684.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c6faf191cf7aa82dc3fd18d10a1eebdc/13624237612.pdf
    • https://ayurmitra.com/files/file/sutujazewexitazoborow.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/90050323070.pdf
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/7cac2433a4d334e627017d53603ca6a6/27165141197.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/62o9q4h4giidtacanp2gro76us/suzazezaxufelu.pdf
    • http://cnkls.com/userfiles/file/1628503751.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/2vigf28aa2q57lmt8qm491juj3/11571444106.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/7r2ulf6prtm5kcldtsj2o1fnd1/57479316096.pdf
    • http://dighakanchaninternational.com/FCKeditor/file/25062909555.pdf
    • http://internet-trade.cz/UserFiles/file/gopifonivog.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/56456423569187291a0ae4195e046187/verovutakasulos.pdf
    • http://celyroknaterase.sk/editor_uploads/system/files/paziwirupusibumipobo.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/9nr3todf0182mqiommeg51a26b/nakubigamatudax.pdf
    • https://apskarota.org/userfiles/file/87530941884.pdf
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/37857360449.pdf
    • http://apartmany.cucoriedka.sk/data/files/daxopejamisupo.pdf
    • https://mkontakt.pl/dat//file/bizemunetisopa.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/923ac6d29ef8c4c7933a906a9d7d7a4b/muxefogog.pdf
    • 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_off0000df4a.bin
21a7484590415f21eeee59b86d30ca2d00fa46b6709f9fffe1c8e11751ceff86
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4A 17160 bytes
font_01_sfnt_off00010beb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 16792 bytes
font_02_sfnt_off00012402.bin
52806f63c25126b7cff448d25cf70b5dad6d08ff7af24f66ff6527a8dad2e842
pdf-font-stream PDF embedded font (sfnt) at offset 0x12402 10852 bytes