Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed03a01d85ebf1a9…

MALICIOUS

PDF

76.8 KB Created: 2021-01-11 23:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 98cb07e0e040003e3c323b517eabbc99 SHA-1: 74f2c1e7700381bfe77b460847a6cdec5c7709b9 SHA-256: ed03a01d85ebf1a9d020373ccae7448175514be59baa0b708d2586e90c6abe49
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable hosting and a suspicious domain, indicating a likely attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/aws?utm_term=anjaniputra+kannada+song+free PDF link annotation
    • https://site-1168289.mozfiles.com/files/1168289/xazatiso.pdfIn PDF document text
    • https://site-1200539.mozfiles.com/files/1200539/mutoxovuvudefenerew.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/b0a828.pdfIn PDF document text
    • https://site-1209772.mozfiles.com/files/1209772/neighbourhood_watch_logo_font.pdfIn PDF document text
    • https://site-1178403.mozfiles.com/files/1178403/free_download_net_video_player.pdfIn PDF document text
    • https://site-1239195.mozfiles.com/files/1239195/bizagi_process_modeler_32_bit.pdfIn PDF document text
    • https://site-1177817.mozfiles.com/files/1177817/ultimate_robot_fighting_apk_free_download.pdfIn PDF document text
    • https://site-1177969.mozfiles.com/files/1177969/talijoxawiloweb.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/fomaralunex/msrm_us300_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/47780105149.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_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 5304 bytes
SHA-256: 6c3c33f9c23b45b5dc899cf2d5dc82522f16ec10d6c3c7c337641599c7e83b2c
font_01_sfnt_off000101f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F6 10928 bytes
SHA-256: 324a2c64c1cad7ca80f17915792887e75e64a917a442c7e0982863f16d68a124

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