Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fb188015e301a2…

MALICIOUS

PDF

102.9 KB Created: 2021-07-12 22:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b0824274bdea58a65205d131090f0272 SHA-1: 82f8e2bc00e23ece57065b71ed065a05791b4024 SHA-256: 07fb188015e301a28edc71c3cde615fb9c302b21c922518ac0fac0c2e876b29a
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing a second-stage payload. The embedded JavaScript is likely responsible for initiating the redirection or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=pull+your+finger+out
    • https://anctools.com/ckfinder/userfiles/files/xonepejimapekojuwakel.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d64ebbd26e---suninebiririxufufelobo.pdf
    • http://livilgirls.com/files/lakowul.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4dbe523094---92465522427.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/14065500c6985d45cecb0c64b9bca670/44744257580.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/8657368c213b73e2c0ea3904db31b4a3/39422561700.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/aa4ce656953728a7118804e5a48cd745/54175548088.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/4dnc4e6nc76u5uun3pn39ol1r9/mozug.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd2b6dddb8---13972553896.pdf
    • http://capitaldanceacademy.com/userfiles/files/26248336316.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/8bc55ad471588a8a9a54b6839ccb742f/12807156821.pdf
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/f604575f82808b2efbae01687d767c6b/70945465997.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/b2dc80a2f56cfea68d1cc34301fe57bd/melaxitubulujaveg.pdf
    • http://quaint-house.com/55118688956.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/dde9b05cb43cd6135a7d706011651d59/50078707370.pdf
    • http://dj-maily.com/uploads/pages/files/bizigiroxalatemutux.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9e20549c5---rijuvugifuxajulumepesade.pdf
    • http://syuncyoku.jp/upload/file/28397309200.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983777c4520---46475199409.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/2c5ed993126000d18545d59bb5722ccc/37753265011.pdf
    • https://bisnismedsos.com/userfiles/file/kanavowuvitasirovaf.pdf
    • http://pileshoppen.dk/userfiles/file/gewajati.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16099c90074da8---zifojejoxakevabojepuge.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/88771946b29082ad255a3e56fc313b72/senuj.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b51bc31de7---79982741724.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/somosejupixiwis.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013789.bin
4d308857dfc2917356e694e6acf0c5a4eb31e36fc4757913b02929b187898be3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13789 24060 bytes
font_00_sfnt_off00010833.bin
25b936f44d6d5e37a371b02bc685fb345d32eba88669f167b202a1be5afeac16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 10276 bytes
font_01_sfnt_off00011f78.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F78 16792 bytes
font_03_sfnt_off000161d0.bin
9a23bacf14e7326f9c8123849fd27b2f56a7bffa38662654e809b50be00abe61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x161D0 16344 bytes

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