Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d88b164ea26aef…

MALICIOUS

PDF

60.4 KB Created: 2021-10-07 08:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 66ccbcc420e444d9491c7aaf0fa8d425 SHA-1: ee6d851f18d7c3afbb8b7e15382c9ad01a3b2907 SHA-256: 67d88b164ea26aefe9cdb261f13fc7219c39ca73719bb082f4466af10dbc5631
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted from this sample, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6616

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://greenbins.ca/ckfinder/userfiles/files/12687779998.pdf In PDF document text
    • https://natatourism.com/userfiles/files/bosufesagofut.pdfIn PDF document text
    • http://ifap.it/images/file/rurojujazipapumitolutov.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/jivipevapafezixiwizovavid.pdfIn PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/kizafajopivibojatesepez.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/65085427672.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20211006222654.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145bcb2ce859---lunetuzepipole.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137b74602e59---gizijugofugimobibexukudag.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/velekorarevodukowajati.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/17250938845.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16144df97d548e---54073060259.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/49ed8148c61d8bc79821bc19bdcc9ac6/52385786817.pdfIn PDF document text
    • http://zimmerei-possert.at/35105852647.pdfIn PDF document text
    • http://podarox.ru/public/files/kimufuzuwofurozixe.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/fojifonedidelenugosukanik.pdfIn PDF document text
    • http://chirineli.com/img/lib/file/50246539455.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/54161619334.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bccb51332a---61397287710.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/povizidemudezulimis.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/20239273962.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210922_E3A858B747E80D2B.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=introduction+for+kidsPDF link annotation

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