Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbe6cb327b4380c…

MALICIOUS

PDF

77.1 KB Created: 2021-06-08 04:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b004d9977bd58980f831aca69c12daa SHA-1: d696087b04bcaceb2eb718b7f52e9ae29974aa9f SHA-256: 0dbe6cb327b4380ceb7956748bf3b9a30d18708875555a513195bd4e90693c6e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document's purpose is to trick the user into installing a malicious browser extension or update. The embedded URLs and link farms likely serve as redirects to malicious sites or download locations for further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://laborke.ru/uplcv?utm_term=cheat+code+for+idle+breakout
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3s7957jk595hv7ceqq6fuop16c/sititovurezelad.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858b5519611---93063368599.pdf
    • http://mobydick-band.de/fckdata/file/mibifakejosirozirexe.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/jubujopimesetugozudakex.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/sepezibomalatulobu.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/j6meov0r106slgdnq9gv92k6fq/gatibu.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/559e609fd4b55d06dba8c0dda5e1d0a2/kivetame.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/42beab74269a6a3278265c6f5c1099f6/rusojopipipak.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ed5121ad7---vatugubujixujak.pdf
    • http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/kilixitagobewig.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/1tj7kfmerilqb4g4khbmv193s4/6685359255.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01fa60455---24447527373.pdf
    • http://iburgisidimarsala.eu/userfiles/files/mowumamulimaburiwujikaref.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c4.bin
88fcbe649cf5d6d2a67e1298cc92411b59ca54dc54d37251ab97989e9ea943a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 4932 bytes
font_01_sfnt_off0000f1a2.bin
c6d127e5bf938beeaf738a58309c93e0862c603b99e5db45ddd458d623823142		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 12096 bytes
font_02_sfnt_off000119c5.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119C5 4324 bytes

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