Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe3664391ba19fd…

MALICIOUS

PDF

78.2 KB Created: 2021-03-01 19:34:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 42b9161e15276dc6aec97effe278f5b3 SHA-1: e5a4b591ed111f879113456386c380dea945197f SHA-256: 7fe3664391ba19fd4115b424f47b0de285efd861e179ea65de7bc8992efeba35
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 an embedded URL pointing to a disposable hosting domain, which is a common tactic for phishing lures. The document body, though heavily obfuscated, contains text related to connecting a TV remote, suggesting a pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=how+to+connect+xfinity+voice+remote+to+tv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369657/normal_5fdd62dc55ffc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493890/normal_601af26c95911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417128/normal_5ff0446dc0ea3.pdfIn PDF document text
    • https://ninitirasaru.weebly.com/uploads/1/3/5/3/135317350/bolofevitamaf-xuvivuragonum-dameraxaduwapo-suteka.pdfIn PDF document text
    • http://muwosolop.22web.org/bunakepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447434/normal_60217eafbd092.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/2779d7fb93.pdfIn PDF document text
    • http://slamelina.website/falomevefuwavovenibezootinc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5fec22952565e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_5fd67199722a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501774/normal_602dcd8d16475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495413/normal_6029ce13a01a6.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/popifazarosefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461219/normal_5fe92339f412a.pdfIn PDF document text
    • https://nasavizar.weebly.com/uploads/1/3/5/3/135322571/8522c55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fegugeg.rf.gd/whirlpool_cabrio_dryer_af_code.pdfIn PDF document text
    • http://dixuzudes.epizy.com/dlink_dir-868l_admin_password_not_working.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 4680 bytes
SHA-256: 7d8d79b478a822c1cbdc0745b2aceb3f21af0d109a2c5efaf07513d64058ac4e
font_01_sfnt_off0000f63b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63B 11392 bytes
SHA-256: b3ffad56b7a9f7f3b0d0e381bf8123a4d975eaabd17119e66383a383e2599cb7
font_02_sfnt_off00011d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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