Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba654c9e67ecf05…

MALICIOUS

PDF

88.7 KB Created: 2021-06-26 06:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d1e062749dafee49803847c91ab4db3 SHA-1: a7cf7ccd5256204a7165c8a7aa1473e35451ff86 SHA-256: 4ba654c9e67ecf057093a867e84ff9e1e55cb5218e621a0a7611107bd928e691
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Analysis reveals it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting domains, likely intended to lure users to malicious content. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://uamarkets.com/images/file/mavekixotip.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160828edb2aff4---40255518973.pdf
    • http://arci-mp.fr/admin/File/vezavujexabifuwatulubige.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a030a5022a---viguvilalaxageruxazesedij.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd08fe0df6f---kinamirekeberisimujalof.pdf
    • http://hydrogears.com/survey/userfiles/files/311364365.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/5sekar72edkp0m1g3fb5s36kn7/85751330819.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855774b9d91---69521991663.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/46173ae5bd4e7238effd3c3e60684184/52351711317.pdf
    • http://andrelandberg.com/userfiles/file/katozujogajuper.pdf
    • https://hasekei.jp/userfiles/file/saxofupivuvolorova.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075e1d822a69---lavonet.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092dee10a4a8---96812866702.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2ce580b3608db851ea5f78955e3aa046/59214265203.pdf
    • http://ajivikafinance.com/userfiles/file/32876537636.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b562f3414c0---78690043655.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ca62b69572320797d3410f401201509c/redivibenifafusewogavis.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/l16ibu4oeskot8pjvp9t6991t4/55613833110.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f63b3c8ee---38836255410.pdf
    • http://rainbowcaterers.in/userfiles/file/97550668713.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b0a9102a9cc196778c8191cf44726a1f/34138884197.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/971f4d74a9f96a096c39d739b40c06ff/wowesigekuwinekalebo.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9205ee272---39925680444.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c386117896---gepotodotepugipo.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/om2bi4bhempudi7ep7kir0nd93/nudulo.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607427b7e2873---jedikaz.pdf
    • http://riggi.ru/userfiles/file/50053243902.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=general+purpose+financial+statements
    • 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_off0000f944.bin
403fa856de478b5b041d3ab50faa658ce6cf096e6aceb688b205939752bdf37a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF944 10780 bytes
font_01_sfnt_off00011213.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11213 16792 bytes
font_02_sfnt_off00012a25.bin
30b89abba04ead9e3c5d3b3007c968572bf05a29676a4152ad46d4c28ab3a6bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A25 16524 bytes

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