Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac92ad419637113c…

MALICIOUS

PDF

70.4 KB Created: 2020-12-18 11:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cc55d80d98522dd34aaa1d4a08ee1b1 SHA-1: 18cd6f6574a10492fa547251d84c3236e84d6151 SHA-256: ac92ad419637113c4d4a0b1ca552398700ceb1bae1d14da54c67c437138c907b
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a '2013 mini cooper service manual pdf'. The presence of multiple PDF links and a critical heuristic firing for a malicious redirector strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=2013+mini+cooper+service+manual+pdf
    • https://cdn-cms.f-static.net/uploads/4367687/normal_5fa4456378890.pdf
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5fc06c0c60c13.pdf
    • https://cdn-cms.f-static.net/uploads/4382949/normal_5f8d1a20732cc.pdf
    • https://cdn-cms.f-static.net/uploads/4392861/normal_5f965694b82e9.pdf
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/1661207.pdf
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fa31c44ddcdb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc28bf30a2757459bed6a63/t/5fd03ef051357b44bb8ae95a/1607483121150/spider_solitaire_msn_online_game.pdf
    • https://static1.squarespace.com/static/5fc14bb05687f52b6b83d941/t/5fce65e483d2ac65cc48836b/1607362020485/geometry_dash_meltdown_para_pc_sin_emulador.pdf
    • https://s3.amazonaws.com/bidurudilidujug/zugugurer.pdf
    • https://static1.squarespace.com/static/5fc14f89d26ff1194f767fe5/t/5fcb9606393ce47356361058/1607177736669/iron_blade_medieval_legends_rpg_mod_apk.pdf
    • https://static1.squarespace.com/static/5fc2ccee5687f52b6b8d7e2d/t/5fcb60341880ce05e849a06c/1607163957596/mi_gente_marimba_remix_ringtone_download_pagalworld.pdf
    • https://static1.squarespace.com/static/5fc0e464ab79f442f229936f/t/5fc1b9f5eaf37e3b64dcbef5/1606531576478/ncwc_inc_extended_auto_warranty.pdf
    • https://static1.squarespace.com/static/5fc0ec955687f52b6b8145c1/t/5fc1988a5147b148046f7a92/1606523019239/bass_raider_10e_seats.pdf
    • 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_off0000d5bf.bin
783ff5e6d3a65ddb8fa898fac157a3c82a782aeef97616370371456e3d5fa9a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 5756 bytes
font_01_sfnt_off0000e94d.bin
b9020e171cd89facf880abedffe2b9940647c1bb57442db948bd2ef80a439cd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 10460 bytes

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