Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa12653dc1301941…

MALICIOUS

PDF

94.6 KB Created: 2021-07-31 00:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2510a37e9f781550e34f99797f72a643 SHA-1: fb1d84a04435b792523f8f6dfbf3f5830b920bfd SHA-256: aa12653dc130194131809d95a13933d544a1fd7e50968b15b9afafc44ef58706
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. This suggests an attempt to lure users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3181

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.
  • 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
  • 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://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/69bf14ca27d06c16e3498edf2441fa82/11150088098.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/69e77d6ccad45111b81dce2303d5a445/65317683344.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16080a16cd2888---35453834629.pdf
    • http://xinyaoqiye.com/upload_fck/file/2021-7-1/20210701203450195708.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b2802c07607ce1d728fb80f8bca04655/52415063549.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160b6153b1d79c---39003613633.pdf
    • http://medical-1669.com/userfiles/files/2579206638.pdf
    • https://pnlcoach.com/misc2/file/
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608c283627c7d---83890618767.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/o6qac8q6aqop2lkoanefbr07pt/6487473955.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/3b0862ac4fea99f5b9a7a6bb07d04588/lavinonesiwemijaja.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b7aeb9867d0---88685917555.pdf
    • http://studiobardinisrl.com/userfiles/files/71382261733.pdf
    • http://okfilm.kr/userData/board/file/39493549041.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/l39fb1047issakc29svb0vlmf0/59030110894.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/qv186gsaivq4o6m636bp6bj59a/86863826792.pdf
    • http://pcccmiennam.com/media/ftp/file/gejitovimes.pdf
    • https://almudenafernandez.co/ckfinder/userfiles/Files/48920206677.pdf
    • http://vendsol.com/userfiles/file/38984644632.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caac298e677---80613306535.pdf
    • https://bloomland.com/sites/bloomland.com/files/femesumupusufifotozuguvek.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/virogenerobam.pdf
    • http://garage-ys.info/js/upload/files/pusafomuponojewilapital.pdf
    • http://momsystem.ru/public/file/20015501569.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=r%C3%A9sum%C3%A9+du+chapitre+3+du+livre+le+renard+de+morlange
    • 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_off00011826.bin
08534c7c6fb145b053dbd918643e5c20076fa3b78afeb17b3df219f3e25b2e1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11826 11500 bytes
font_01_sfnt_off000132bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132BD 16792 bytes
font_02_sfnt_off00014acf.bin
2d87d3abcf6c9329e06437958ea45f3fc0894b158540fc674b48f49830cb045f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACF 20200 bytes

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