Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe098cdabd57400…

MALICIOUS

PDF

62.2 KB Created: 2021-09-29 11:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a17acf3fbe27bf7bd82e8e8354e4c61 SHA-1: 90cee48a0c27ae625350f9dec0c7854012b42a8d SHA-256: 2fe098cdabd57400d998d8897d3ee7937516f56ceb0eb763a7fead5c789285af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically targeting the 'formcraft' plugin's file upload functionality. This suggests an attempt to host and distribute malicious files, likely other PDFs or executables, to unsuspecting users. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7677

Heuristics 5

  • 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
  • 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://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146ee5a4c4e8---64160977633.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1614e06bc8819d---vezuzifobewudavatol.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf0b35b3e0---wipuzitizorilelogulogal.pdf
    • https://adasms.fr/userfiles/file/8628428665.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f55c6f11ce---71781410323.pdf
    • http://animalscipublisher.com/files/upfiles/file/40523029265.pdf
    • http://notar-frings.de/userfiles/file/viduz.pdf
    • http://eamenfaraz.com/cache/fck_files/file/sapofovakiwetube.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614dcebbe7aec---nimibiwakeromuzujarep.pdf
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/jutagem.pdf
    • http://okudshava.ru/userfiles/file/debugadepuninarib.pdf
    • https://balaji-technology.com/userfiles/file/zubuj.pdf
    • https://coluer.ir/documents/file/misabejesokikurasi.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0aef9708b---guwexuvafumotapejebififul.pdf
    • http://kxxbs.com/uploadfiles/file/a/57633248421.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133e9e891363---wuwixoromuroxar.pdf
    • http://xn--z92bzy85x.com/userData/board/file/16456873066.pdf
    • http://wohingltd.com/userfiles/sosolimejef.pdf
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/31295851418.pdf
    • http://kamakuralosgatos.com/uploads/files/9785553131.pdf
    • http://occahomesearch.com/userfiles/files/56817783384.pdf
    • http://www.peritaonline.es/ckfinder/userfiles/files/xatebivus.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ff6e1bde6---juzuwitibanij.pdf
    • http://bellina.pl/userfiles/file/78083134816.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=ios+status+bar+for+android+apk
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b455.bin
a3303342c545858d5676612ce1cbb5723e025ecaebcc757cf49a820fa8dc17ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB455 17952 bytes
font_01_sfnt_off0000e1fb.bin
a10371c18e7dab81819c563f31211a7a1103d3418c03143dabb439cb65d81ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 10596 bytes

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