Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08cfacbec447707…

MALICIOUS

PDF

78.8 KB Created: 2021-02-27 22:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1ed1ed741e6d3aa9f181fcf8678f989f SHA-1: ddecd15e823d31686f1419e910e12375b3183b6c SHA-256: e08cfacbec447707fb71eb91600c65e0c24f5e514bc4caa7a5fc20aaa768a4f9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to driver downloads, which is consistent with the external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://xezojetit.ru/award?keyword=asus+m2a-vm+audio+driver+windows+10 PDF link annotation
    • https://takijotirodone.weebly.com/uploads/1/3/1/6/131637658/vajupamupijod.pdfIn PDF document text
    • http://bevubupowin.22web.org/how_to_prepare_for_fmge_from_1st_year.pdfIn PDF document text
    • https://cdn.sqhk.co/pizokifuxe/eGgiUSu/saluwadidexi.pdfIn PDF document text
    • http://fusobilel.iblogger.org/dupowisadidifa.pdfIn PDF document text
    • https://vuligezu.weebly.com/uploads/1/3/5/3/135391643/4610cb30.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/corsair_k95_rgb_platinum_xt_price_in_india.pdfIn PDF document text
    • https://momuxubodi.weebly.com/uploads/1/3/1/3/131379397/3781834.pdfIn PDF document text
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/sozalosilovoj.pdfIn PDF document text
    • https://cdn.sqhk.co/meduxemij/Pjh7Cgh/xomujedufabugowipuze.pdfIn PDF document text
    • http://wusodopepufex.66ghz.com/fetimaxoxawarevajaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bisumige.epizy.com/babarokutabeju.pdfIn PDF document text
    • http://pimobepetokonud.myartsonline.com/letter_from_birmingham_jail_last_paragraph_analysis.pdfIn PDF document text
    • http://bugamaxu.rf.gd/nimiwerefupelojeladonasi.pdfIn PDF document text
    • http://venewimo.rf.gd/nafudimavifedetes.pdfIn PDF document text
    • http://nenenadixipuso.rf.gd/3m_manual_200_ml_cartridge_applicator_gun.pdfIn PDF document text
    • http://dixediw.epizy.com/82341835752.pdfIn PDF document text
    • http://nimozan.epizy.com/korg_electribe_2_-_synth_version.pdfIn PDF document text
    • http://motinekan.epizy.com/86468659176.pdfIn PDF document text
    • http://nuwumexuxesi.epizy.com/54533747284.pdfIn PDF document text
    • http://vakisetituli.rf.gd/pofalerowegamilajubova.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_off0000f86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86D 5436 bytes
SHA-256: aef16ac9a1f374596499ef0c235879375b2c58fa24c846209e66aa87a547c6d2
font_01_sfnt_off00010af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 10136 bytes
SHA-256: 7b2d91c60738cea338d80a3a5edc2a5845f6e9ec4eb105bf5b814c340b589e90

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