Malicious PDF — malware analysis report

Static analysis result for SHA-256 6249b701b395b0c9…

MALICIOUS

PDF

67.3 KB Created: 2021-01-11 21:22:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00da936e4602fb3f0cd678f0e2f7d65b SHA-1: 05d2f8b13d8886c37abd39ba5649c49f58c4dbdb SHA-256: 6249b701b395b0c93344f309da8acea8b8bd09d184851fe6f611c4404adc8c20
244 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains, suggesting a link farm designed to drive traffic to malicious infrastructure. The presence of a link to a known malicious redirector and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to downloading YouTube videos, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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/wb?keyword=youtube%20video%20download%20browser%20android In PDF document text
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5fc9b06705b12.pdfIn PDF document text
    • https://soxigirotum.weebly.com/uploads/1/3/0/9/130969819/9302193.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/gi1QhgY/flash_game_player_pro_apk_download.pdfIn PDF document text
    • https://site-1166068.mozfiles.com/files/1166068/5832700243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5fd23642cadbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5f9152445028e.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/Phcjbid/kosirizazorapelad.pdfIn PDF document text
    • https://gejuvidafi.weebly.com/uploads/1/3/4/4/134456396/varakas-fufit.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/cifcieZ/que_es_memoria_iconica_en_psicologia.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/88d60910d917d63.pdfIn PDF document text
    • https://site-1171850.mozfiles.com/files/1171850/zeboxidonijog.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/AhgSxFG/litatologuvewefudek.pdfIn PDF document text
    • https://nilizexuv.weebly.com/uploads/1/3/0/7/130739046/lumipinis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ccea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEA 5072 bytes
SHA-256: 17fcc02ea1457db4f610d924d0f4eb1c013d447f9946890543b7e7de749d73b7
font_01_sfnt_off0000de4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4D 9980 bytes
SHA-256: 03d607e58d97328a17cb11b21b0d0752736defd5abc8e4ba7322afdc061ea550

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