Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd27974afc3e059d…

MALICIOUS

PDF

104.6 KB Created: 2021-06-27 19:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd444f335049071ba7d1d5fa83dbe01f SHA-1: f916a24fd0c09deeff3cd0ff21b620f5d9755bd3 SHA-256: bd27974afc3e059d6fc4704e8fe7d8f35eeaa751a1bda0d880a8cf7a771da85b
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL targets are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/f50dc5335c1472e66782a6911729aac0/26977164351.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ace87d42b---zisemo.pdf
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/sokiz.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/919gougmb2pna2ni6vcn63f434/78162522745.pdf
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/jatatajarugudazexogu.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c71d07cc0---76536125996.pdf
    • http://allmedicus.com/userfiles/file/27544581167.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/p6hgun0i03h0evq8ll9ti184qo/gupodupegibujunikajil.pdf
    • http://4grd.com/cmsimages/file/90984590697.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607b898575390---nagazolosa.pdf
    • http://amoy-art.com/Upload/file/vadeludik.pdf
    • http://magyaringatlanadatbazis.hu/dev/_user/file/85449900806.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/f8310f280200b5032a8f9bacfeb67daa/49318102294.pdf
    • http://syuncyoku.jp/upload/file/kakitedodazig.pdf
    • https://lamthong-marchph.com/piceditor/file/womowapexeruganimutavilel.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080e334b37d2---15828029459.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/766554db9736118397966d6b41890479/86820239106.pdf
    • http://www.mediagrand.hu//data/editorfile/semojoxadik.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094641c8d66e---31234207047.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0s1tsit7vlssjj5gmjjhg5sp01/44709364165.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/23qec5c2ivj01gh5rvkjosemrh/37541936443.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/dabf6cdf7593e53170395dc1caf126d3/wipesa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=driving+test+theory+practice+questions+and+answers
    • 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_off000133a6.bin
9e75cdadeb361e16a58686dc1fcfa15eab08aff5a5dc3de33edf4872969b973a
pdf-font-stream PDF embedded font (sfnt) at offset 0x133A6 18044 bytes
font_01_sfnt_off000162f2.bin
2a5434a68c1747a11bac36da2e9a04aa361dc06e5e8963ccbffe2a23a2ad7bc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x162F2 11260 bytes
font_02_sfnt_off00017ce5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17CE5 16792 bytes