Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2af139d2360e48d…

MALICIOUS

PDF

99.7 KB Created: 2021-07-01 19:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fd3f73ba643cfdd42bb270438eb8aaa6 SHA-1: 1541ad3ab52cef70e27d7c3e8af71227e194292c SHA-256: f2af139d2360e48d39980e3eedb2d2a04464a7298fb53c7f8df5dc3677a33d06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. These links are designed to redirect users to malicious content, aligning with the characteristics of a phishing attack delivered via attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://wastran.ru/uplcv?utm_term=the+meaning+of+desertification PDF link annotation
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/3e0554949a1137a560905a21e3db6d4e/kesojatenopamig.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/70903457773.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/10c1190e5782176597245ea0c8ef5b97/kenojobolavekini.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b25b7c916---37651083862.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/28582463526.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818eeaed7fa---73650777166.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076616d7872b---fepiguvubelapivotodigub.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608c8e1a65a28---90258985993.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5d47ad61b---20722619057.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e0c26e95333a4de0530c5d45b8f36ed/58974098408.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210616_A641F5749CA14422.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa583dd4770---tigojupasaputola.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/rerujodoxo.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/fegaxagoguwe.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/fibofonalaxarepevit.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/13929917978.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/93376105887.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16078efcf03d31---80393058606.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbc2f0a77b---xexafozavusupebofibosonud.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883b742f169---25986816483.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/bejufedererefulosejet.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/ae482664f0272a55ee9f13eddba4c55a/8702335074.pdfIn PDF document text
    • https://carlojans.com/cms/file/rivujukas.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/67780760727.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160983ee4e0d5c---72545594435.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_off0001231d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231D 18152 bytes
SHA-256: 3b7e2efd3c3eb2aceae21558173596276d2064e3ea5368ecfa523f2fe58ed976
font_01_sfnt_off00015097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15097 10840 bytes
SHA-256: 8a9170ecf70255d5d4ed6e79571704f0bd35d1f9e2b4d140f85ff7e6e439ba35
font_02_sfnt_off00016936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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