Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60d3ed605b092ff…

MALICIOUS

PDF

89.9 KB Created: 2021-06-29 21:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 28819c55b6b09c69a871084cf0b3fbd8 SHA-1: 7fe46fd71e2ab462bb960e8f03ed70be70beb498 SHA-256: f60d3ed605b092ff7f892ad75cdbc7d0faff7f0e99e212beeaf42b0a2137d04e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into clicking malicious links. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://infrive.ru/uplcv?utm_term=the+backpack+kid PDF link annotation
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/8c4898c88bcc8392cde243797d9a1c61/wulesowuzasederurogulebu.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/putugateteguwa.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/hp40241e7bq8fb9l1jmq2ba513/49301598547.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc1332f3bf---deviwogolo.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/18f6fb46a8cd33dd56146df67025d63d/pelikepegofumotidulemabeg.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a9780f1a538---zuxepidijipikobumilimaxak.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a2c4cc6d8---dupisowopobevizukexemagiw.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844aeaa1fa5---xanonowarifikuxod.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/dawibuza.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/3f45e6c3775ba82f6004db06ba281f4d/dorujetoku.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/151a90ef5997841da07717557f680475/kokel.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/bc95eec17696038fe1440773ef60484a/71156844410.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/43849722239.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16095a9cd5d561---ligowekiwabugu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb7acc481c---29976000548.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/24434218929.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7cf0440d5---86974394381.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091e8bd549fc---pujovuvivutojogaxedosi.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/97514821833.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9120b6397abbb587630da5f0df2c2e1/22173556521.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/bozem.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/guvobofutubasaj.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b32b98b00df---95856351023.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_off0000fc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001148b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148B 17844 bytes
SHA-256: 2139c266c827978cf148ad77b18ed7c85f8cef32cfafa9bc3bac5078d6bb68dc
font_02_sfnt_off00014280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14280 10172 bytes
SHA-256: 2826aed92bc48a208f23bb963efed57c41a4e59b381ce95cb3a033136f0f8916

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