Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc544112ef2473f…

MALICIOUS

PDF

119.5 KB Created: 2021-08-02 02:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c5a0efc19e12d03d6abbd261f3b4e60 SHA-1: 08a357085db81e1b7b4161396ae0ed8ec2c0635c SHA-256: 7bc544112ef2473f28fbfd151f8ad660c510ca477aecfb2f229bb06916de8f56
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous links pointing to compromised WordPress upload directories, suggesting a distribution mechanism for further payloads or phishing content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5118

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://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609af57707ce2---tizaledijidavaxus.pdf
    • http://wanyuantemple.tw/userfiles/file/tupifudasuzuzababex.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd63487bf3---38334305953.pdf
    • https://imagebeaute.fr/userfiles/file/golariloxojidobe.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a5baabeb5cb---dizabip.pdf
    • http://greer2001.com/clients/e/ea/ea56749d84c1a2d7db36d2c51c833a37/File/gimama.pdf
    • http://koryosushi.com/uploads/files/pajarogimirofevel.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/80966498227.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/10cse60f79pl2cguvhqfbu3ce5/49786840265.pdf
    • http://ylpcl.com/ckfinder/userfiles/files/dagiradeberifug.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/7e182680053dd8b896b9314166846259/56324408505.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/3979e3e65364b204741dca9fc7f476c2/lapofidurapedel.pdf
    • http://kiuanai.com/userfiles/file/81471315971.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/0dcfed57072c53688e2801003320f5e5/69546217085.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/7c75de68969702271fea96a1cc5f9613/76935273154.pdf
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081f20338990---dipupofekapesezesekivu.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a733b465b12---42465192191.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073239b1a203---99932604390.pdf
    • https://infoenergie-loire.org/userfiles/file/20922617327.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a8ea748f5---mupitudevabivixen.pdf
    • http://carscaso.com/js/upload/files/lozuxakotinuwukiwobemi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=metodolog%C3%ADa+de+las+ciencias+sociales+esther+d%C3%ADaz+resumen
    • 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_off00018761.bin
78f7b7998a5acd1f6679d814ddd640fb8554e9ed5db231a80f1592d0cfe83d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18761 11032 bytes
font_01_sfnt_off0001a09c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A09C 16792 bytes

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