Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c40b29bd891d2cd…

MALICIOUS

PDF

88.4 KB Created: 2021-03-18 14:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20bae230bd8f637a3f27b576e0655a1c SHA-1: 7666fceed31dd273baa0fffe477ba805ba4f3d74 SHA-256: 5c40b29bd891d2cd41aa940167a635066f743919d17e5d56970d73af3979e633
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a URL that appears to be part of a lure, likely to trick users into downloading a malicious payload disguised as a document. The document body, though heavily obfuscated, suggests a theme related to "Asean outlook 2020 pdf", which is likely a pretext for the malicious download.

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://mezovuduw.ru/award?keyword=asean+outlook+2020+pdf
    • https://cdn.sqhk.co/zuboxizip/jjaFtic/xaxisopazo.pdf
    • https://cdn.sqhk.co/rolileduvof/yehd3gf/weran.pdf
    • http://xinuvaro.sportsontheweb.net/using_articles_in_english.pdf
    • https://jefupijoban.weebly.com/uploads/1/3/1/4/131437873/7fb73851a284.pdf
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/reban.pdf
    • https://sepuzudagek.weebly.com/uploads/1/3/5/3/135329554/8381846.pdf
    • http://jipolavex.medianewsonline.com/samexi.pdf
    • http://mafejaruvoje.sportsontheweb.net/todos_los_libros_apocrifos.pdf
    • https://gojelubimutur.weebly.com/uploads/1/3/1/3/131384605/6c4645.pdf
    • https://cdn.sqhk.co/rijomawonuj/hhz9jiE/ferowosorokezamivujiguw.pdf
    • http://guzolupe.iblogger.org/87221999627.pdf
    • https://gurazelifu.weebly.com/uploads/1/3/0/8/130874247/18d1dbd7278f96.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kokelegamud.epizy.com/wemawafegom.pdf
    • http://sivuvupaxiju.rf.gd/43769096195.pdf
    • http://ludumidajite.rf.gd/huebsch_washer_and_dryer_for_sale.pdf
    • http://vipujaxetixise.epizy.com/battery_management_system_lithium_ion.pdf
    • http://sexesivakolek.rf.gd/python_2._7_15_windows.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_off00011b57.bin
b67e742fe7dd1d2eb9ed6f85beab98a7f275e0e001512fb86153eae7a5e3a2ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B57 5264 bytes
font_01_sfnt_off00012d59.bin
d6a735a0a482fda9e2763b3c225f406775182839bcbb01c95e8c518d0f4a0093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D59 11120 bytes

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