Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c15fad24406d83d…

MALICIOUS

PDF

144.4 KB Created: 2021-07-06 23:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68b710de1e6809a05202699f93b935ed SHA-1: 89319acb5b6c1009ddb4a83867da5bb6580ebb13 SHA-256: 0c15fad24406d83d747056378ffa6b47cd0767c97bef7bc4653d1cc67400ade7
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. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malware. The document's structure and embedded links suggest it is part of a phishing campaign designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16079bab6e7107---80261090163.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/a0c65ac1aba93a12a946424a409fc296/56283482699.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/a99c49cea265706363e6a63cf53f4719/4676938394.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/d5f4a9f80e97f9927bb7b4e39cd35267/38527222468.pdf
    • http://xn--eyt274i.com/upload/files/54757446393.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/ce1e4caa85e49f84ee4828b957ef0c1c/16272517782.pdf
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/36858723373.pdf
    • http://nuraski.pl/wsg/userfiles/89765083943.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/suv8oq8bnpvc1p6jpvdklnb1d5/15904022413.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ee38d8990---103956044.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077aa4e8fb7c---nawer.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0bdf61662---52512593854.pdf
    • http://abnicum.ru/files/file/pibavuwezetorige.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e50e781c8e7e552d9c3ae0a9aa352d42/44792360832.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/t0d8gk6jurk0jr6uvm7bsivgtg/rikolosuzoguzajowikivut.pdf
    • http://lamdecal.com/Images_upload/files/53441174839.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/206b885a33b7ecba6ca596fd1eb007d4/veputewelum.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099569a63156---9567348609.pdf
    • http://parkhigh65.com/clients/4970/File/88482785640.pdf
    • http://cwesp.biz/upload/file/38159907826.pdf
    • https://cochleartudaskozpont.hufiles/81947817827.pdf
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/s4461fdq8v28qftdlolr0vafm1/60186138361.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=which+is+a+reactant+in+the+process+of+photosynthesis
    • 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_off0001cd2e.bin
96402d092d9235bf5de7197a5488c50f31f79606bff72fa7dc8b59e330e3ead9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD2E 20456 bytes
font_01_sfnt_off00020326.bin
2611a40395cc99bb6b54da868b94ef949dca7a390a7f4191fc8358d292507025
pdf-font-stream PDF embedded font (sfnt) at offset 0x20326 10640 bytes
font_02_sfnt_off00021b8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x21B8A 16792 bytes