Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2ecf1df1a93fc6b…

MALICIOUS

PDF

88.1 KB Created: 2021-07-23 00:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a2d1fe36eba8a60b5107a7cde8bebbb SHA-1: 0812ed2f14055e8d8d214c522ab037d678a349f1 SHA-256: b2ecf1df1a93fc6b80d9e4438ba49e209324bd593c4889e14667d516de24dd58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious content or redirect users to phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/if4i3kmnsrc9ljo4ihku73hq72/49845652423.pdf
    • http://cpgny.com/userfiles/files/19446134077.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54cbcc4e0---zidalaginivizowomonu.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/be993c30743b62aa760d61eea10523a7/xaxexanexaman.pdf
    • https://datatech-int.com/userfiles/file/rubuxitezejilepuke.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf091554f---21923701340.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/gac7e6nib5h8bvm6855v4vnk41/zozizamelel.pdf
    • http://c2r-auto.com/uploadfiles/file/2021071606535573499.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608544aa8f7a1---meladudimubijotixowo.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160dd679cb462f---sirobuva.pdf
    • http://firanywiktoria.pl/uploads/editor/file/93137319133.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd37fbc6260---37559368445.pdf
    • http://luvnchrlysenglishtoys.com/clients/861429/File/68500467029.pdf
    • http://euroear.eu/ckfinder/userfiles/files/33358184747.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/106a8a10df2c27fa8b873382b530c662/temitarotuvipewubetinizu.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/d3f544e882b39af97052e6772096f2a6/53162053552.pdf
    • http://zubrcup.by/files/files/22584258154.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c901429447---89216218769.pdf
    • http://rencontres-icare.org/userfiles/file/segitalikuvem.pdf
    • http://luvnchrlysenglishtoys.com/clients/861429/File/19708712645.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e05852d59---12684449363.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/vhlsh4ful293s0m2q6gg2kdnf5/gubolarodavu.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/0isfi4r4uviffjpi5c9kfa77k2/xurelimeregufek.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ccbbfc0f8e0de2bf57843de9a60fa15c/fatejipojebonufowenog.pdf
    • http://korvet-sp.ru/userfiles/file/29412355126.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b63478dd5---fexosutodivoxuped.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/dujs3khvjllqcbqimo0tbln7b2/xofukudax.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=aql+military+standard+table
    • 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_off0000f536.bin
0881468cb3ee15f55a7f39aff9ce4bffc79964a252623d045556116a7b431587		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 17188 bytes
font_01_sfnt_off0001221e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1221E 16792 bytes
font_02_sfnt_off00013a35.bin
643f8146f227904ffe2a6365338906ace40541669e4df4f9ef52987d2bb4c413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A35 10672 bytes

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