Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1585c8f2cb0cf8…

MALICIOUS

PDF

72.2 KB Created: 2021-04-02 05:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d01eade5cb7d1b3ceb56ac2294f30179 SHA-1: d3ab4a705345da48189d786166bc03ab3c2374b0 SHA-256: 0a1585c8f2cb0cf872004b71eada52adb9e60d1866d6ddd39d79103ee15d01ad
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that redirects to a suspicious domain, likely intended to lure the user into a phishing or malware download site. The document body appears to be malformed or obfuscated, but the presence of external URIs and the overall detection profile strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=wildgame+innovations+feeder+parts+t6dc
    • http://zufonirawanowo.iblogger.org/tarowanus.pdf
    • http://wumagakex.iblogger.org/what_happens_to_tectonic_plates_at_a_divergent_boundary.pdf
    • https://cdn-cms.f-static.net/uploads/4482188/normal_6025b42b90b5b.pdf
    • http://dozufonujip.iblogger.org/zone_of_proximal_development_in_the_classroom_examples.pdf
    • http://miruzoguke.iblogger.org/how_to_install_snugride_35_base.pdf
    • https://cdn-cms.f-static.net/uploads/4413013/normal_604e10e688f96.pdf
    • http://semarogejej.iblogger.org/96234563045.pdf
    • http://xopopiniruf.iblogger.org/34847414951.pdf
    • http://didezidise.22web.org/4637011423.pdf
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5fc9153fdfe90.pdf
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5fcf993d53b3f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wobuzisibal/how_to_remove_a_poulan_chainsaw_carburetor.pdf
    • https://s3.amazonaws.com/resixexi/example_of_a_pro_forma_balance_sheet.pdf
    • http://xagewozutuke.epizy.com/66442218548.pdf
    • https://s3.amazonaws.com/nefomojuwet/how_to_put_mods_on_skyrim_xbox_one.pdf
    • http://palakojum.rf.gd/gonasinelelura.pdf
    • https://s3.amazonaws.com/tikofaketonub/do_neurologists_diagnose_autism.pdf
    • http://kemetosope.epizy.com/lagomedipag.pdf
    • http://fukokikedusej.epizy.com/shared_task_list_app_android.pdf
    • http://jajunegetilu.rf.gd/kobagiwilok.pdf
    • https://s3.amazonaws.com/xupimaral/transformer_bumblebee_costume_template.pdf
    • http://ferirapavo.epizy.com/57610874237.pdf
    • http://gemixeferakin.rf.gd/bi-_weekly_project_status_report.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_off0000d8ef.bin
f247d56871e04f2e24074db976538cd140f9e755500ebe6626e9065c6c95cce6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EF 5704 bytes
font_01_sfnt_off0000ec57.bin
b557f95512fad92789fdc57a1f8e6aa729a5cee40ef2b318aef053d60cb8d1f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 11252 bytes