Malicious PDF — malware analysis report

Static analysis result for SHA-256 1092a2431e792848…

MALICIOUS

PDF

78.9 KB Created: 2021-08-01 11:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: e1145ba2fac227b1626789da4e929d32 SHA-1: d640dcdc2895b9be76b7843709aa685ba7e6bf4a SHA-256: 1092a2431e7928485a8410a895b5ed0141da3d31a770121a254b213d2cc70b1c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://ketchas.ru/uplcv?utm_term=bola+de+sebo+pdf+descargar PDF link annotation
    • http://www.mezmat.ru/ckfinder/userfiles/files/31124203512.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/cbe0be27799afbd787f8f586cc928404/nirafabimunemelugifake.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1621534022.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fc22b6a5b---38645603558.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/17659215522.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b78d0dccb3f---62729676845.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/kibirojijonug.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/xemajupaverikokor.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/89484531286.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/gehej975agrqvo9is6iicu3lb1/zisezopepaxomorib.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8b9g7peanetajfcd175hegvrg5/fobedijodowoluvuniwutili.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b09f2966972---47493780646.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6b69794fa---fidavo.pdfIn PDF document text
    • http://paliukenas.lt/i/File/82299668235.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16244651298899.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/46fc19303f5172dee818b184180c3d5f/jexulavipuxekanumodiko.pdfIn PDF document text
    • http://regmac.net/userfiles/files/lifasegaxigajes.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/sunuf.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/56651167172.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/maleros.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/novigifole.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/a23e1901195f7eaad38bf2816531085d/79038193011.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5100dc8858---37159004377.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/furupomepipupewofib.pdfIn PDF document text
    • https://sambelteri.com/contents//files/43823228551.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFCE 10692 bytes
SHA-256: 9380092e91c506873ba712329d42f1160d2e4451dd335fa735bba43256bd5d56
font_01_sfnt_off0000e80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 17756 bytes
SHA-256: af22ccf02e63c384c7f493edb29a4bc4e3adc9fe31a2d9f4d1031e3d16ba281e
font_02_sfnt_off00011533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11533 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.