Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe9eb846cc6d311…

MALICIOUS

PDF

87.8 KB Created: 2021-06-28 22:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2104260b155ee3148a517db94983b50 SHA-1: 342a04de9541c5ca3fef6acc6fc1e63c366a4cb9 SHA-256: bbe9eb846cc6d31188ec94822c1430af106f23772e6ce90c70410a9b06b00a43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it functions as a link farm. The presence of external URIs and the nature of the links indicate an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=ancient+greek+colors+meaning
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d9f1ab4ca---jofuxokefatut.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608b37f232b45---84016472496.pdf
    • http://conelser.hu/fck_uploads/file/damowiko.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/b3a71405b9bddd86959a3de9590b308d/mikebi.pdf
    • http://ylgems.com/file_media/file_image/file/mutagorowakuvuwopoj.pdf
    • https://bitree.ru/ckfinder/userfiles/files/73321319043.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a103007cc79---66435286028.pdf
    • https://accuratesearch.com/userfiles/file/wufakajumegimoriduwivoni.pdf
    • https://tenekedjieva.com/uploads/file/85537113007.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/5k7utkg0d5tgeqcr0vekjn61r3/dakefugeravojumakuz.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2b77ee54---52080056637.pdf
    • https://atphp.ch/userfiles/file/21408576869.pdf
    • https://aimhc.com/userfiles/file/9736609397.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/vdo04t7acq22t8ri12eov2kta2/38505221749.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7ed0d6b0c---mekumibovajosen.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/89tas1ftjam5e2kmduttpof7rp/12421053697.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f52fb33cc4---20123491772.pdf
    • http://hoangle.vn/uploads/userfiles/file/26239283353.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86985b5265---vanovikunax.pdf
    • http://pnktools-th.org/ckfinder/userfiles/files/88054320264.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ed418fa2d---lemewumo.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c301edef5---92615319370.pdf
    • 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_off0000f1fe.bin
f964ad547a6caca94dc904830ef2e71647f97605d2f0a696bbc029b56c999ec5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 10648 bytes
font_01_sfnt_off00010a68.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A68 16792 bytes
font_02_sfnt_off0001227a.bin
6d8cc4896fd596899cfcf45595cb54f9f54a848e13d38b3da4d884bbbf184993
pdf-font-stream PDF embedded font (sfnt) at offset 0x1227A 17480 bytes