Malicious PDF — malware analysis report

Static analysis result for SHA-256 d489fdf11dc75bc0…

MALICIOUS

PDF

97.8 KB Created: 2021-06-25 16:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c74d90ed551153ab2a515771b45b605 SHA-1: edc6de7e66d9184a48ebccbee249b98eb969bd3e SHA-256: d489fdf11dc75bc04957dfc2025b89ac93d171445419aaa85bdcbead6eb5c056
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further indicates a malicious intent to host or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://allytemp.ru/uplcv?utm_term=broly+movie+power+levels
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5ede0a00c---57732963764.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/cdj15r1tct8d0ar7v4pu733ut6/rofudezupejogudofamib.pdf
    • https://arvikabc.com/images/uploadedimages/file/65374673572.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3e86c0094---45605976759.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/27e9704affa511e9a50e27fdd25aed65/54338200458.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/5t7so4j8hu0k8j83ki2lsmf14n/58798136115.pdf
    • http://logiccpacma.com/ckfinder/userfiles/files/rumanenasatabopezimizelo.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160982a4d1c04d---21282245283.pdf
    • http://merwepizza.com/upload/file/wuxemusikumopajalasovaba.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/vbgp86tel4pvba93nuq9463hj5/91958095347.pdf
    • http://ilturismoinitalia.it/userfiles/files/20543741623.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc72adf07a---lopife.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b9558a18c---17781801325.pdf
    • https://rmp-traueranzeigen.de/cms/files/92512165564.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f371.bin
f3a5d2b4cbf23564c4ecf5abf652627e21bb19c74d1db426d6670497ef29b9f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF371 17948 bytes
font_01_sfnt_off00012211.bin
e7a736c0ad36934a0197e9afdcd68726eddb520233ce51fe8505a7fbd9f96f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12211 10368 bytes
font_02_sfnt_off00013992.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13992 16792 bytes
font_03_sfnt_off000151a0.bin
a05d581c8ec19b8c330c3d4a176f4d3ef20547f957b03bf5829e112690904a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151A0 12952 bytes

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