Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bd7eae5eddf64a9…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 09:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f686797ecaf43e7aa0cd9657992029bc SHA-1: ec7c7954371e45451ff472008ebad47fa06c7348 SHA-256: 6bd7eae5eddf64a926bee8d0d7eee8ee09de1784144e65399a267cec0433a7f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malicious content distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically related to phishing. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=turn+off+app+optimization PDF link annotation
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161350c7b187e1---87278947439.pdfIn PDF document text
    • https://tectrongim.com/uploads/file/19499669877.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/bebevupasegumutusomoku.pdfIn PDF document text
    • https://hongming-eco.com/userfiles/file/90568174143.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/37231924574.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/31537979232.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7653348cc---rekelesonitovagitifer.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021091902334473499.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/61179307381.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/fatufuvepuparujam.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/37212208036.pdfIn PDF document text
    • https://rossbeede.com/userfiles/file/pevewilo.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/19924528341.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/44286290482.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/pekofemival.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/nujenisaxo.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/vakubo.pdfIn PDF document text
    • http://xn----9sbkvfu2aex3d.xn--p1ai/ckfinder/userfiles/files/bogigatemaluxudow.pdfIn PDF document text
    • http://faradbox.pl/files/file/kusawojul.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613908cc38b8c---xijolavagex.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/1620086048.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/89492748734.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/70560364342.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/gozegipesekun.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/mujodurujogafikakiduradu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 10296 bytes
SHA-256: 33408b5736d1be9b0ffb11b7480597df598f0afb0e8de487c1f9ec873de9fd03
font_02_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 17496 bytes
SHA-256: cc7efc19a9f415329bb68c359c1e75fe74da91a8527d4b76fe8c8e85b3448189

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