Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0763deaa4e85d8c…

MALICIOUS

PDF

72.5 KB Created: 2021-03-10 14:49:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6990eece2d276527e6e1fc34a5ef41a SHA-1: ada61c7c3aa56de007568c4407f84ad3e1879651 SHA-256: e0763deaa4e85d8c03f05d1a806f2c41d9952f8527224f0ec5aeb8c6aaf94cca
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/123?utm_term=nollywood+movies++mp4+2018
    • https://setanalad.weebly.com/uploads/1/3/0/7/130775470/f01ee28e59b35d4.pdf
    • https://nesaresivegixan.weebly.com/uploads/1/3/1/4/131453215/89bfdc2699.pdf
    • http://e-devletodeme.net/bakekunovivazonujozs5fgr.pdf
    • https://babejogoj.weebly.com/uploads/1/3/1/8/131856270/a3011f.pdf
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fe00bc339f36.pdf
    • https://lutesikesopisej.weebly.com/uploads/1/3/4/8/134884151/0e870d208ecbde2.pdf
    • https://cdn.sqhk.co/manigonodapu/gSthjjh/mobile_legends_bang_bang_pc_online.pdf
    • https://xewoxexe.weebly.com/uploads/1/3/4/3/134398473/vogujaxav_kaxeloxumofupef_kerodazabogami.pdf
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/xerimavonolutan_sapimesil.pdf
    • https://cdn.sqhk.co/sozaxejiv/hibrjbA/mcat_exam_dates_2021_usa.pdf
    • https://dimalosuzilem.weebly.com/uploads/1/3/1/4/131452887/ebf53c7.pdf
    • https://cdn-cms.f-static.net/uploads/4411489/normal_603c351b2b236.pdf
    • https://cdn.sqhk.co/pemoxeriko/dBd9LJD/scp_096_mod_for_minecraft_pe.pdf
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/2938958.pdf
    • http://normab-id.com/41701763080g7xvf.pdf
    • https://cdn.sqhk.co/kofelejezem/fgcoZC1/nba_game_6_live_stream_free_canada.pdf
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/bc983f.pdf
    • https://rudiwiguxovo.weebly.com/uploads/1/3/5/3/135317070/wigidelud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_01c081f0d19f43eda5cf92dc04083a31.pdf?index=true
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_bc7e1d2c276f46ef9a8adeb41ebf4d6d.pdf?index=true
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_939721aea196406d9d1ee0678b6ae280.pdf?index=true
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_4ecbb3ee1a0e4775a1cdbd7c821291f4.pdf?index=true
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_74ec81ea1db54d408f95b07981a56b81.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dda0.bin
1fe6f4e38795424fb93ffe224e4bc3cf4d0e82f04a413b7d6f58a17bafcb3a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 5628 bytes
font_01_sfnt_off0000f0f0.bin
e75027a4ea68ee6fe8fde3618864e99a448a0bf3021e3083f39cb53465b2d27b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F0 10288 bytes

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