Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccc7f1179ae6a37…

MALICIOUS

PDF

97.6 KB Created: 2021-06-27 13:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94db701ab35b95c35f078a865829c10d SHA-1: fe8e4d3e1ec71afe07d611cabed6b1522aa8ae53 SHA-256: 2ccc7f1179ae6a37bf30776d9c18f6aa9caa20ff817cba2f1d74c0c9d417e5cb
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. ClamAV and ML classifiers identified this PDF as malicious, likely a phishing or trojan delivery mechanism. No scripts were extracted, but the structure and URL analysis indicate a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/tbvcipfkvk4hfletp0f0sg74n5/losoxoxojulozoraratetu.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a1af87ae4---fugukigo.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5a7aa7146---xifufuwinit.pdf
    • https://pointvirgule.ca/upload/editor/file/ruxuwaleweb.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/5e0839d73c1ba09390e8b8a4db26b74e/36908573883.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c728a338244---61768209948.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/4447f739ad266347a3407e502627e3a9/bafowotiteb.pdf
    • http://alemotta.com/resources/original/file/nugijonosigegipavomosog.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/a79fc81bc96b126daefa1a83bc9fe3fd/7590282909.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897751c21a0---7958629465.pdf
    • http://21cedu.com/pds/userfiles/files/34537736897.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4a22df28b---14026260954.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086e145954fb---basib.pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/4b2d72425e93a26bace173ad458025af/winutejer.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/8853f56760c0ec525fe62e624525c61d/dariwetusigiwegekerupovo.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/55086419927.pdf
    • http://rallyteamwalraven.nl/file/18847300621.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/a26f3e4ae8983fbdf1d7ed659729c52b/11736312245.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/29833369260.pdf
    • http://sysquare.com/UserFiles/files/bexupojiboganenubajabuv.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/octg5btt1bh7c0qb21rfvt96g0/75780715954.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c06524372ff---titatagisamizanizenidawis.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=rh+negative+and+aliens
    • 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
font_00_sfnt_off000101bc.bin
a28582039962ec683fefbca3540b405f614931867674ae7d682c812638487190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101BC 18340 bytes
font_01_sfnt_off00013190.bin
fbbd995f7beb291021ace1362478e792d3488f6505f1337690176050a2966317		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13190 10420 bytes
font_02_sfnt_off000148ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148ED 16792 bytes
font_03_sfnt_off000160fe.bin
0b3a94f5d29539056ab5987d54a4fd4477c434444ae2d7f5823d101cfd62c2cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160FE 16332 bytes

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