Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb349393c6f2d4be…

MALICIOUS

PDF

89.3 KB Created: 2021-06-29 12:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23e352043d4c90bee009399ce5aea61a SHA-1: e35a61dbca2c955cf9457b4a3373708f6d715e53 SHA-256: fb349393c6f2d4bee7611cb7e79abbcf85b2283ad5aaa6bc96fae24bfdb2518b
156 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to various compromised websites. The heuristics indicate a high likelihood of malicious intent, with ClamAV detecting it as Pdf.Phishing.Trojan. The embedded URLs, such as http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608091c86becf---zagesowubukemovivofigipuw.pdf, are hosted on compromised WordPress installations, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608091c86becf---zagesowubukemovivofigipuw.pdf
    • https://anfauglir.com/images/file/34463716757.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5dbd2b7c5---32246001109.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7krh4c04hdj1v3rjm74g7m1rgr/14852751081.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/c2c7f8bbb518fd03846abfdf0d4fd703/fotitolisoma.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/915d11e3d4d443e144290fe7d78b4184/67082968014.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab43fd8895b---57253767339.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/u48rf0abultbh5e7vi176d1ube/mebufibavetuju.pdf
    • https://aslimitada.com/userfiles/file/fiwesamobotu.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/43bf4c1b05e6bb15ca7001568cc7d121/8796752418.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b839d50e51e---xuxasojutufusixusosow.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb00f5eadb5---38491996347.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c073254d137---81701026241.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1ae2159a2---gaziku.pdf
    • http://buergerforum-tirol.at/file/neredewazeponulomiwiwuz.pdf
    • https://idd.no/ckfinder/userfiles/files/tapimazugotojukikejigaroj.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e16604f193---82183215046.pdf
    • http://tano-cable.com/d/files/63288006720.pdf
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e1e5dade4---semebiviviladasazefepobu.pdf
    • https://cafemocion.com/userfiles/file/pazubin.pdf
    • https://promise-land.com/upload/file/4176495211.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bb642713e---73942069413.pdf
    • http://hitourkorea.com/FileData/ckfinder/files/20210607_FBE46D1228D9C111.pdf
    • http://agiusfuneraldirectors.com/files/file/82886220191.pdf
    • http://ajk-opakowania.eu/upload/fck/file/vezimijikewoda.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+necklace+pdf+full+text
    • 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_off0000fab2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB2 16792 bytes
font_01_sfnt_off000112c9.bin
9bd148ca027ad48c5aa9385ca5c1642f1da5cf0938ab4698c2f18b6ea30935f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112C9 10496 bytes
font_02_sfnt_off00012a9b.bin
1534e783ecddb2c3109e7bf26bf3c59840b88eeca8680fbd6fb74c19d05faa8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9B 17088 bytes

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