Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c07a911cad76642…

MALICIOUS

PDF

148.4 KB Created: 2021-06-26 14:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c66eac88bfd862479dc2bd1dfef61c5a SHA-1: 8581bfdc160c21bfac32d11dbc6bce97c6d5eb54 SHA-256: 5c07a911cad76642fc8c359a093b4283ff8ce85610abfd14f957d4fadc02d5a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8792

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 https://irlanc.ru/uplcv?utm_term=philips+ds8550+manual
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d26749e483---61557226358.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210511172941.pdf
    • http://moscow-vernisage.com/files/files/85910626239.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5108964c3d---97641603891.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/n6oqb8qn8ong9dell4noh9dai1/7939972598.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160cab1c63471c---paxaboxidogujuvibekipari.pdf
    • https://machinex-machines.com/UserFiles/File/86936637160.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f095f65128---jofejelemikowodetedif.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/376bed10c08118c1efeb897cca0fd414/98197926817.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/134061f0b49657e7ab997b7845d12e3c/79233543269.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608808a886c3e---taxenamonago.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca07feee1af---lerawulumidifejoj.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b0eae73ba---vigusuzebogivo.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/c292dc25eab9909a3e1dc4e132014708/84021686299.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d699dea1b6b---61888830130.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b30438032c1---71671393747.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a59332c418---rolome.pdf
    • https://budapestpainter.hu/ckfinder/userfiles/files/30659689577.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/8umt1gr0l1nvtdjbqgs9kkoubu/43317865183.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/mafk6c30pf04nrs8ilk1f0q2e7/bepeleluke.pdf
    • http://abwingsva.com/uploads/files/21633825639.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718a42b6ffe---zewuko.pdf
    • https://chungcungoaigiao.net/uploads/files/serosutazoxomuxesujin.pdf
    • http://ahlhy.com/uploads/file/081429046865.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000208f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x208F3 16792 bytes

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