Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b2dc94a9964aab…

MALICIOUS

PDF

76.0 KB Created: 2021-03-03 03:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0d5af7407fcfcebd7bc76c5a8dfd297 SHA-1: b11138cb0a288bdad8f1793408502dc08e324966 SHA-256: 86b2dc94a9964aab2540db540ca6b30133ac06736483c1a3f4088055dd819191
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 a suspicious domain, 'resalured.ru', which is likely used to host a phishing page or deliver a second-stage payload. The document body, though heavily obfuscated, appears to be a lure related to a French phrase, intended to trick users into clicking the malicious link.

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://resalured.ru/wix?keyword=what+language+is+paris+je+t%2527aime
    • http://lavka-karamel.ru/wexuvesawifimexavuk5osxr.pdf
    • http://xesubixuj.iblogger.org/derulikimifokanefese.pdf
    • http://grampus-shop.com/97773056773gvap0.pdf
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5ff9c468c5723.pdf
    • http://seduxizewumi.iblogger.org/pomamo.pdf
    • http://tovelksa.website/99951169547muk9t.pdf
    • http://esportzmlevent.com/how_to_set_timezone_on_lacrosse_atomic_clockh4lha.pdf
    • http://genonobamubus.22web.org/opera_mini_browser_latest_apk.pdf
    • http://startask.ru/davuxskope.pdf
    • http://wemedimixodi.iblogger.org/jonsered_2255_chainsaw_parts_diagram.pdf
    • http://vijuziruzunubiz.iblogger.org/c_redistributable_all_in_one.pdf
    • http://delaem-sami.online/how_many_chapters_in_berserk_volumeut9ds.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wikurixobelu/psp_gold_emulator_games.pdf
    • https://s3.amazonaws.com/dozuga/predictive_analytics_reporting_tools.pdf
    • https://s3.amazonaws.com/seriposuj/gejarabulu.pdf
    • http://nawexox.epizy.com/dusejamopafevunu.pdf
    • http://lenadupubop.rf.gd/ap_calculus_bc_limits_worksheet.pdf
    • http://rexojapabafim.rf.gd/34178925751.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_off0000ee19.bin
e58145f7397cbdc4efef4448bcd9730f18a2c91bebd167da98d7f99e840398e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE19 5356 bytes
font_01_sfnt_off00010041.bin
b9ada12f35e0020e18e1222dfc150a4eaf05669989414d2681a820c34a9c8b4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 10164 bytes

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