Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d03fc4338cd45ee…

MALICIOUS

PDF

78.3 KB Created: 2021-03-03 19:23:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7ee1f6263223caf27a7820167f0f8f3 SHA-1: 70d5b5a5e34aea5133abb5e40b4863df096b2d00 SHA-256: 1d03fc4338cd45eea6eceff542eca82e3e601b53ce09e995a702d33d4a4a46c0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The document body text, though heavily obfuscated, appears to be a lure related to a 'gym puzzle walkthrough', suggesting a social engineering tactic. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/wix?keyword=snowbelle+city+gym+puzzle+walkthrough
    • http://bagerisevi.scienceontheweb.net/how_to_write_a_critical_analysis_essay_introduction.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vujuvisesakok.myartsonline.com/maytag_3000_series_dryer_belt_replacement.pdf
    • http://zesezajuterop.epizy.com/captain_underpants_halloween_netflix_cast.pdf
    • http://dibiremiva.rf.gd/low_carb_fruits_list.pdf
    • http://mikusadetov.rf.gd/wafapepijofujapagaf.pdf
    • http://litorow.myartsonline.com/48977305377.pdf
    • https://s3.amazonaws.com/bupijila/xabasonugadewiwuduguje.pdf
    • http://fidekejasogam.epizy.com/mowowusitodi.pdf
    • https://s3.amazonaws.com/tarajix/20725841531.pdf
    • http://dejarovagozude.epizy.com/29458034771.pdf
    • https://s3.amazonaws.com/bogijexu/tokele.pdf
    • https://s3.amazonaws.com/xupimaral/nikanelusodarozefugo.pdf
    • https://s3.amazonaws.com/mexesazaxasa/logarithm_word_problems_and_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ed.bin
62535e5ddcadb9291118ff1579a7809ba9bfb27c45aef12523b7d49b22c4205b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 3824 bytes
font_01_sfnt_off0000f481.bin
e7c0d4dd489b3aeae058f2239fb4a44223d4191eff10a01a7fffa23a7265f627		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 5720 bytes
font_02_sfnt_off000107f3.bin
d2ddc2715f06cb7c69b37a50626011f1da36dfbad9255165beaada557f31050f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 10332 bytes

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