Malicious PDF — malware analysis report

Static analysis result for SHA-256 d065757affde44a2…

MALICIOUS

PDF

85.3 KB Created: 2021-09-03 21:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 860f05b380acee9c2c1f1c6a430aa392 SHA-1: fe9817193cda69064ca9d808a0fea87fb9557438 SHA-256: d065757affde44a271be5b077d5c16a1facf81ecec9208a5ebd4a9fd3af600c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, potentially for SEO poisoning or to spread malicious content across multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=couples+counseling+worksheets PDF link annotation
    • http://snap-drone.com/userfiles/file/jamazilegusivuxaxoduviju.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/0e9d88824a272ffe1b9653b61342b7e3/dazosa.pdfIn PDF document text
    • http://01host.ru/userfiles/files/gipelexudosazikadixemurel.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/wefepuvolanewadopiviwoluv.pdfIn PDF document text
    • http://cooperclassof1970.com/clients/9656/File/81745217287.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/cd1o4v5ohhicotp2pjc8ueacg6/tokijexiwubotixu.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/52969703089.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/nonufexefufuvetikun.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/kumimatofawupepamogabexi.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/zakedob.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/f3cc646b8838a95b6a5720d6c38b3d09/82164218352.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/raxule.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31476758363.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/52326527911.pdfIn PDF document text
    • http://shoreluxurylimos.com/userfiles/files/35841926565.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/wolux.pdfIn PDF document text
    • http://noxsun.com/jingkelun/userfiles/files/20210811193404.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/40189643363.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/64400382197.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/73922404322.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acff5c239e2---sejodedinelona.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c595e39d179---21096298862.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/a2ujt9f867ucb71ikoatm49en3/zaxukawanufewopijomebogiz.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_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 18484 bytes
SHA-256: b62681fdc10db17959b052fb736b4599a0371ca86aec65afd38032cafc301af6
font_01_sfnt_off000116a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB7 10800 bytes
SHA-256: 186847094d48006ed847542b8c8849eaae46956a58dba88f1e32f75804a02003

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