Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fef13357a6c4e06…

MALICIOUS

PDF

90.1 KB Created: 2021-08-12 14:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d9ae2bbe2c5aaef2b99906d125591806 SHA-1: 20fd0ddd16ae2ba0cdce7dce1668dcadaa9a9b8b SHA-256: 0fef13357a6c4e06dde97d422d653fe8d28795d994670a8994ec1192042826a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to external sites, some hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9333

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://nomylo.ru/uplcv?utm_term=canto+xii+purgatorio+pdf PDF link annotation
    • http://opusbiz.kr/data/editor/file/8362912160ee0540aa770.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/6e8dce7d48971d9c680f911ccf747e9d/62515060439.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/lorojawemotod.pdfIn PDF document text
    • https://arendic.cl/files/69911040760.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/22887724343.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608319c41d87d---baxukukako.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/51625688190.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/462766eced924de5b15f9a13f4fad144/mulomegoweroxu.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d59ab45b2---10135038876.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/o7gbtl0e2j4gadt5i0jjto6eg0/25115932288.pdfIn PDF document text
    • https://eric-parnes.com/ckfinder/userfiles/files/rawol.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a24aac4026e---vojotanubureripuwake.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/mibaxibuzozobolesezepofe.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/ha73n2mbpcgc0ac3g29bslp004/53324884009.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/18968877755.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/79293735690.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/jumefiwufisixilup.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa89460404---goxowopatewidikuvitajep.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/69478832259.pdfIn PDF document text
    • http://tischtennis-kiel.de/images/file/11642335586.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/tiwanuvulubevi.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/71c80f5e7f39ec008b70250fac05b39a/nunemitawuj.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/elehasans8vp0t6b0t28f3sc9i/81519876914.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/73407113420.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140AF 18260 bytes
SHA-256: 5c86082d408effa68c997720e6e5dcbc65a3e5fc3e49dfe067e9a6d64bc7b888

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