Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc93c9b91881a00c…

MALICIOUS

PDF

98.2 KB Created: 2021-06-26 00:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ecd20255e57c1deab72c278f9206a61 SHA-1: 358ba307786928dbc57053215390cc4931a46907 SHA-256: cc93c9b91881a00c191b4393ce7590a6fbda0e190c3f1b880a693630ce53aad3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites. These links likely lead to further malicious content or phishing pages, aiming to trick users into downloading malware or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://crysiq.ru/uplcv?utm_term=why+does+voldemort+want+to+kill+harry
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/ce68b2139ca144716e9c995acc670bc6/42089836482.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/ddefaa8c1c6266687f744f0a140ee961/29844273972.pdf
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/6944310112.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/1as769uq84ctc1dmtiebd12k8r/73471608617.pdf
    • http://herve-coiffure.ci/files/23121324552.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090c577678d4---83660881942.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074254236440---bukebufofakaxizi.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/f7i5c0g26doh3ht7ihs24ggf48/kasijixo.pdf
    • http://taskentcompany.com/userfiles/file/12402806072.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/85bhbf0ih0gh8g4jctb18sdkrg/19298683664.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b897048bb77---37564969672.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609eaf6a692dc---luxunoluwi.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f48402d2d---sidovu.pdf
    • https://elnativocoffee.com/silver/upload/files/72242071261.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/b3eb58e42624987f932b526ecba98f37/74232501763.pdf
    • http://irinaburmistrova.ru/files/lizijozuxalavozuleki.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/lu4rsksajp22t8sv70r70u8uej/fudawine.pdf
    • https://www.carrentchiengmai.com/files/jejuvapevepi.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/4404ab86d294901496485037e0622b80/56405463058.pdf
    • http://nova-auto.com/upload/ranulepolebunari.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949ea19867a---32917850415.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a46fce2e881---ragemukimuzojodonupe.pdf
    • http://dejede.com/userfiles/file/susunabudedaxapexoruwis.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a296fe6e90f---88624578641.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d82.bin
03e67b200fbe7d9a8760e06ecf53e8336878f67fa13b15b3436fd2e85c62cd7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D82 10864 bytes
font_01_sfnt_off00013679.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13679 16792 bytes
font_02_sfnt_off00014e8b.bin
b8656f40756286a1f53c45144d104d43a16380bd03c248b59306ca51b562af32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8B 17044 bytes

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