Malicious PDF — malware analysis report

Static analysis result for SHA-256 098127b7a9333232…

MALICIOUS

PDF

91.7 KB Created: 2021-07-06 22:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dae4758890fb6ad02dc37aafdc0b3d01 SHA-1: f079dcaccfe1551a15e25617973f1255b7a33c97 SHA-256: 098127b7a93332329548a77c6f1ad04a9e3343153af0c7c6b8b83f52ecf93a0f
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 phishing or malware distribution attempt. The file contains a link farm pointing to compromised WordPress sites, likely serving as a lure to download further malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://crewmak.ru/uplcv?utm_term=daily+lectionary+2021 PDF link annotation
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c580b31e1cd---14732746250.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/15aa4764f8d50b02319f0b8d1ce180e3/winukaxapeda.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/faginewudedapifuke.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16074d658e6a4e---26346348998.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160a14151276f9---sibivibesiwa.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a75972509---nikiwakogozunegojixuwalox.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/xenaloxilobuninujako.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/a6b6c5a07ad14ff7ae2418f218ca2603/1141708205.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/91800748011.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/553497942fc722982d584360d6ba9f1b/tosapagodamub.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bb451e0a32c---rarafimejufelosakatesi.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/11449973465.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/16225689461.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe99e30c6c---bokarigigovofemujopunojof.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926de41428c---xonitajegula.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/sojarutunusatoge.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad14c52340---webetalodufi.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/7a2odlnm8mhogqleese2iilti5/dodebupunolufezabed.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094be316b331---lutigokobemedefidukove.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/4faed19823e9ad31797d5090be80746d/25986372000.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aaaaa3cebb1---8681523087.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce72843b9c---19490871763.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/bth0u363bmmfvbmstvluteuvd2/44129226463.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b8ffa865e2f15f43c1f44116f5c8b4bd/weguvuwapubin.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/f4feb033511d204a3019b39f106f6e56/xarenej.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/66497636472.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/ekjhdua67ofj772t742klh6qh9/26985920477.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_off00010733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10733 10464 bytes
SHA-256: 01739d1ecf6b08fe583682824d15958d7347766fe3b6bebddd4273b40850c40b
font_01_sfnt_off00011f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2D 16172 bytes
SHA-256: b515b9c518fd608ce87c14ebabe0efdb4be62c76755e19aacc3b0b0b30246a77
font_02_sfnt_off00014915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14915 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1