Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2590635a4b15d3a…

MALICIOUS

PDF

75.4 KB Created: 2021-03-27 17:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0d485d3ac76d6ac504117ab95235a806 SHA-1: 9a20b9bd991a32c6f7a3dff95ededdc49f8aba04 SHA-256: f2590635a4b15d3a39f52c8c826885980a926496064cd05071cf3cc01da2a6f1
142 Risk Score

Malware Insights

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

The PDF file contains a link farm and uses a lure related to PDF to DWG conversion, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL points to a suspicious domain, likely serving as a landing page for a phishing attack or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/award?keyword=convert+pdf+to+autocad+dwg+free+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374848/normal_601786a32a079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470385/normal_600ff4cd69732.pdfIn PDF document text
    • http://vermono.site/zalamasejuwomorametalanarjgxb.pdfIn PDF document text
    • http://goldstein.capital/pathfinder_intimidate_guideyxxjm.pdfIn PDF document text
    • http://dontbeshy.xyz/how_to_make_instagram_black_theme_androidironz.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/6PgdgjY/kozomuvimewixejuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/sisuriwul/aSsOidw/iphone_x_ringtone_2020_download_pagalworld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_603ed669b0330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450138/normal_6014426d9a022.pdfIn PDF document text
    • http://relax35.ru/tifijagewoxeva8dsk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487632/normal_601a571237a3b.pdfIn PDF document text
    • http://insuranceautousa.com/91364571916fy7w0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/885cba05-96c5-4b57-84db-2dd8d33953d2/risk_measurement_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13ccb2c-1c9f-4629-a3b0-94bd0d7d3828/65988913164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978fcafb-aa1c-40ae-b233-a97dd752543e/how_to_change_the_code_on_a_kaba_simplex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680020ba-c2ce-4384-a161-085c5e241b9a/ruxokerogomuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b07b799-9d3a-4554-9cef-010fc4001a90/panasonic_twin_handset_cordless_telephone_with_answering_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5107c025-1f52-42ac-a5c3-925c231c306b/41909613423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0bdd9d3-e1e4-4327-ac95-35955a882bfb/sears_air_compressor_regulator_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e03a1ff-d200-486c-a11a-069c95e729d1/kimenumapizugurezunakuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45ab9a9-daaa-41e3-bf19-401277728186/29013325807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b1b4aa-4d7a-4642-8fd1-76d13894c3f3/90392296154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c40dd8-0f0a-4fab-b002-918220f5a7b0/home_maintenance_for_dummies.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_off0000e9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A8 5200 bytes
SHA-256: 81091fa3bb9a44a9435274bcc4cc0c62eb9a822859280313a7375f72bf551dd1
font_01_sfnt_off0000fb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB80 10856 bytes
SHA-256: fd027bc51ca57b0ff43827dc027dcabe9dc8cb6ca8fee356ff23b971fa530dbe

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