Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab84b946d439f31…

MALICIOUS

PDF

84.8 KB Created: 2021-06-28 16:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04d43013f6d219d4ef86a1c169c452d7 SHA-1: ceab320b4d38e85535bb610e783019a22d7a4d98 SHA-256: 5ab84b946d439f31786751b5bf853a9f68bbbc2c29db61f6c3040f3212264fd7
156 Risk Score

Malware Insights

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

This PDF sample was flagged by ML and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, likely intended to redirect users to malicious payloads or phishing pages. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://alteanetworks.fr/img/file/moxodagefotofuwulavaviwen.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/4b4e09425c912a5f900207a0d6cdbe47/dusilamitomijarafa.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074108883894---sosenatifetitobowisonur.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a4266c8a1---99225980488.pdf
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/kevudisixibali.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/57ed8401a1fd73d6771080b543f54ec8/56480410901.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9853c271c---49824968332.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/d7b0e011e885f0e343f5cb9c36478262/zikinajegupine.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740e28b1f37---24245697474.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/72f3125f6d1a6f6243593f1e2b657fa1/buxil.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9c1abc8148---muluwaga.pdf
    • http://bmsorganica.com/userfiles/file/39360837566.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab60d3ff5e---jozugerotapiliwarezisoku.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a283285ab---71943633495.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/24add353fb2f6224d2a47d4e040d9565/30239579638.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160847d8bcd7d2---6451619789.pdf
    • http://bright-mineral.com/uploadfile/file/2021062402045820.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b256fa02f21---58515862617.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608454db5681f---nedoguwenexizafeza.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/07832d15fb13d21979fc09c3db8532b8/3633966349.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088713381627---39217551342.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=adrian+lester+staged
    • 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_off0000e981.bin
76dfac62890167347f8b75b1a77f1eda8dcd644753fbb630b8e852c08998a356		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 10284 bytes
font_01_sfnt_off0001008a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 16792 bytes
font_02_sfnt_off0001189c.bin
d3ccb3c24124e765772b6737d33df1754304eeef8060e5b752720c656b053b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 17088 bytes

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