Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ee8905b6ee5ab4…

MALICIOUS

PDF

72.0 KB Created: 2020-11-13 09:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 58f29e1c6d5cddaf19bc35464ca12a25 SHA-1: dc7463a64341d8e5dbd6864bd33f91f8c61d0f94 SHA-256: c6ee8905b6ee5ab43a83b592d9d53a4730b06ba956e75ec5cbfa22a8a17c11b9
344 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file is identified as malicious by multiple heuristics and an ML classifier, including critical detections for malicious redirector links and a lure for browser extension installation. The document body, though heavily obfuscated, contains text suggesting a "Mega upload file" lure, which, combined with the SE_BROWSER_INSTALL_LURE heuristic, indicates a social engineering attempt to trick the user into clicking a malicious link. The presence of numerous links, many pointing to disposable hosting, further supports the link farm and redirector activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 8

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • 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.
  • 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://gettraff.ru/strik?utm_term=mega+upload+file In PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/4083579.pdfIn PDF document text
    • https://xatuvapezorix.weebly.com/uploads/1/3/4/5/134595272/zovobi_wawajidaxinawu_jazilonusif_wutuzepewegi.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/4370304.pdfIn PDF document text
    • https://latujajadaf.weebly.com/uploads/1/3/4/5/134593938/bisurubudusonobog.pdfIn PDF document text
    • https://nilanifaken.weebly.com/uploads/1/3/4/7/134702232/sulas.pdfIn PDF document text
    • https://pobanuritixejun.weebly.com/uploads/1/3/4/6/134601578/8084368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f8e86d8bdf9e.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/ec6cba7733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokofapig/olympic_queen_mattresses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d913b491-42fd-4ea2-82a9-d6325c603a89/kumbathile_kumaranukku_kondattam_mp3.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/deer_feeder_plans.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5D 4940 bytes
SHA-256: 46285802e1897fe922491d3bcf99b83f9a10c75c62b53baa7e863c06a3f4acbd
font_01_sfnt_off0000ed56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED56 11272 bytes
SHA-256: 107c65e62cff0acec9120bb9a5418cc208b3621f19607b7dd8b128358d35ba41

Open this report in the interactive analyzer, or submit your own file for analysis.