Malicious PDF — malware analysis report

Static analysis result for SHA-256 334eac39e9176862…

MALICIOUS

PDF

83.7 KB Created: 2021-07-09 23:35:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 912bb38a37b4312bf233c2fe00c6dce5 SHA-1: 78bf97816fa2158a37f6957b9b5b9807494d4a62 SHA-256: 334eac39e917686228049d2fd04e10d11ece7584d82514a2ba0cc1fbbe06a7b6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to external sites, many of which appear to be compromised WordPress installations or disposable hosting. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ketchas.ru/uplcv?utm_term=lotes+in+english PDF link annotation
    • https://giverny-bkk.com/upload/files/rururajalupilezexuzor.pdfIn PDF document text
    • http://geodez.com/pliki/file/lidav.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/91162518004.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/6683bc870988ff478739313e05271392/97183117071.pdfIn PDF document text
    • http://slsnn.ru/content/files/81828906619.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/bufivuzulupurilojowisiwad.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/21522588313.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/906a0ab2eeea7295392acd07599b54c0/47255944841.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/80023232087.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/77048524378.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d33cd85429---84269498504.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/0e4f01b2730359c1f22b7c560522b5fc/memivaxoposudemotojixuwi.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/vuduvifikabekuferulokoxim.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099d064675e7---pasutax.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/c5eb9782c739c1563c1dbdeeca6e1881/gomafiwejojolurimi.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/o1h0skq2p6jfkvlrc9jvl2fu6h/28184278833.pdfIn PDF document text
    • http://congluc.com/upload/files/bitesunibino.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f6f955097---41612578165.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/66483169294.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/rixidedasorososajuxo.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e41d5a7c84---xudamirobolaxexuzipidola.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/51876317905.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160994e56cae06---nubumorisimukiw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF616 10084 bytes
SHA-256: 773b5c6f2c266e0e257f55005985b294e6100fc5a01b01d8c749a1614eb6c338
font_02_sfnt_off00010c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C69 20280 bytes
SHA-256: 93634e7d50e705534cc99abd6f2907478b51742d17c8847d1a953e84f7a276c0

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