Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88000e5dc93ea34…

MALICIOUS

PDF

74.3 KB Created: 2021-03-02 06:38:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e93e569ce5f5264da5112ddfb286ef58 SHA-1: bbd731dbb9c4d6dd5e46d8fc08fc74a928d7513a SHA-256: a88000e5dc93ea347d92e366bf3710e8b0e7e90ca1e110006275d356f0959e51
96 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 URI pointing to 'https://midufefew.ru/wix?keyword=fruta+planta+ebay', which is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to online marketing or business names.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=fruta+planta+ebay
    • https://static.s123-cdn-static.com/uploads/4370542/normal_5fc6cdba431cf.pdf
    • http://lulumel.66ghz.com/lalivozafesukunezuge.pdf
    • https://cdn-cms.f-static.net/uploads/4405195/normal_601a4cdddc641.pdf
    • https://cdn.sqhk.co/gunuzuli/bSiaiih/best_online_marketing_business_names.pdf
    • https://cdn-cms.f-static.net/uploads/4405419/normal_60289f05bf44b.pdf
    • https://static.s123-cdn-static.com/uploads/4369163/normal_5feca0405e40b.pdf
    • https://cdn.sqhk.co/vugasoveg/ricgdhi/5484906322.pdf
    • http://gidpopiteru.com/36023081762uj5xo.pdf
    • http://sberpodarok2020.online/bowusitiwoxisalalemixesirf4yj.pdf
    • http://mon-cmb.best/can_i_see_my_samsung_notes_onlinebytev.pdf
    • https://cdn-cms.f-static.net/uploads/4452386/normal_6035a54c4a783.pdf
    • http://dixivurozepesu.iblogger.org/replacement_for_cadmium_yellow.pdf
    • https://cdn-cms.f-static.net/uploads/4460471/normal_603109e0df3bc.pdf
    • http://scarcebook.com/shiver_maggie_stiefvater_movie_casttapha.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zukusuvajijip.epizy.com/easy_way_to_quit_drinking_audiobook.pdf
    • http://tuzegonu.rf.gd/annual_hr_budget_template_xls.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_off0000e49b.bin
b635ce6129e3c8ba26b52bb0a5b23f95e28a8c90091b74c9508ee77041db8c47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE49B 4832 bytes
font_01_sfnt_off0000f51c.bin
c8ca5cc97d0bf095e3b900da560394230d6735558e2ecd3ab0b6c1601f9058ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 11636 bytes

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