Malicious PDF — malware analysis report

Static analysis result for SHA-256 9606785e46972214…

MALICIOUS

PDF

95.7 KB Created: 2021-06-27 22:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1c12679c232688d1ebc4735165af465 SHA-1: 83b4d12f8ff949997b7476021963020a82a4f343 SHA-256: 9606785e46972214102cf6af55f94531aaa3c1943fba59320aab4793821239bf
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature. The primary attack pattern observed is the use of malicious links within a PDF to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://tyextractor.com/d/files/vawagekatugoxitumuxixugij.pdf
    • http://goodmix-psc.com/userfiles/files/18290709399.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b162475f7cc---bomefez.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160929de7a93f5---19524458950.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609690fc2139e---poruzowibomozer.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/14e6f9dbe4776994b71557e6a9b6c69a/5478281277.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/6d9cd425974d06580c2b4cf9c8cf24c7/58956173051.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75877aa9f4---safazi.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/a6d62773220348025507bc4f6196cffc/7032522760.pdf
    • https://almuhja.net/ckfinder/userfiles/files/keralapakemixix.pdf
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b121050d7bb---nemoguwowikuw.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608062a960faa---83733993643.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac32773186b---85420991063.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/9cf2a3993c5b084e48241c1978fb6f0b/fudiranewerisazozegoxaje.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/c482ac058884838972ff336cad4d10b0/vebatuzakilupiduv.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3daca1c1d---fubabudejolemogobuxopoted.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7c41466e9---woranemafetozawiji.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/a0a198ab91e44455a85b47401868313b/renujirixe.pdf
    • https://musikkursus.dk/userfiles/file/mobexozatel.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071b86eb7e25---83915460440.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac34610ddc8---vevavegikozabati.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078b7ec2ed78---nufopuxazugasekiwaveg.pdf
    • http://etasystem.net/userfiles/files/54565728211.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a719c3eb9---wunirebaxitopovijizov.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbe70e0fa9---riraponofasutagej.pdf
    • http://cbgnfinance.com/userfiles/file/pisonuvovigadu.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/df7e6ef756af5a8bb7a753cab33fce7a/vofurijuzudotasim.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=numerical+reasoning+test+questions+and+answers+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_off0001120f.bin
41cf03e6496ea1e520c59befda6f61448533bf7143b5313c5a7831c08b335ada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1120F 11272 bytes
font_01_sfnt_off00012c0a.bin
168ccad1020d2d5441771ac26bb286f0887a2c7092e7fd9ca528f01fab169fbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0A 17240 bytes
font_02_sfnt_off000158eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158EB 16792 bytes

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