Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e71fd0ce72739f3…

MALICIOUS

PDF

87.9 KB Created: 2021-08-10 22:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 61e06a976f95d1dd78753234b741ca37 SHA-1: fc9374e0ae263ddceddaeff8470261dd9a9a164b SHA-256: 0e71fd0ce72739f37332dfc659e191c7fe2e05e1b61eb44749f0f0e03e6f9e0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS uploads or disposable domains. The embedded URLs suggest an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://crewmak.ru/uplcv?utm_term=how+to+turn+on+kitchenaid+superba+oven PDF link annotation
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/79911587901.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/wibajus.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/483424f3b29db6b121ce431581bd32ff/6797022747.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/12692727921.pdfIn PDF document text
    • http://simonide.org/userfiles/file/xurifigifekagoradenem.pdfIn PDF document text
    • https://kopari.hu/files/file/30715557539.pdfIn PDF document text
    • http://digifast.cz/userfiles/puvumonoletenowaxonu.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160fd3aa850ed1---bomogegujedu.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/e6d0757d853551a37e233ec01e731107/57491689392.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/cb7a034c8316a8da17d09253615693b7/32811480495.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a7be2b19bf4---renopudiliwofulodev.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/dfde61571e394f1bcec0733dbc15a462/fotozaxinuvatosujut.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1026c18454---vazugezov.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/bugebudesot.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a550cce9fbbb6a883f600d49c2e02102/33375076841.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/pekubisutefak.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099c3ca2c823---42918714353.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/63261388145.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/76222005072.pdfIn PDF document text
    • https://ayurmitra.com/files/file/wajebasesegovef.pdfIn PDF document text
    • http://www.toeterloeh44.de/files/xanimekoginurogaluxug.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a11aab4f9ed---56064244102.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_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D9 18448 bytes
SHA-256: 8f53b19f88d38d15ef197e1c2df27692687bc81db119965235d1d5add0d096cb
font_02_sfnt_off0001367d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367D 11040 bytes
SHA-256: 8e9b91444d81ed22d32667001ec89f3a2ed26239354c4453fdcb1e9ec1d8e65b

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