Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ce1a8525f19f12…

MALICIOUS

PDF

75.8 KB Created: 2021-04-01 00:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6110654c74db1d72fc4dd1034b3bf589 SHA-1: b3d07f89f921a7236f35ef08e6bc26eb37280b47 SHA-256: 98ce1a8525f19f12c2e35e1bd13ae27e36042b6584ba8f1277ab92391b87deae
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating embedded URLs and is flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'wwe 2k apk obb'. The primary IOC is the URL 'https://golowaki.ru/wix?keyword=wwe+2k+apk+obb', which is likely used to host or redirect to a malicious payload.

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://golowaki.ru/wix?keyword=wwe+2k+apk+obb
    • https://cdn.sqhk.co/voravaxa/igixogc/amnesia_memories_shin_guide.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://pasadurasasagi.medianewsonline.com/misasupozebiwir.pdf
    • https://cdn.sqhk.co/kitujesijak/K6ijXp0/posajukoledudalijenak.pdf
    • https://cdn.sqhk.co/webuzifinuno/83hb1Vw/60266862575.pdf
    • http://zinusefubowewet.22web.org/lawomawetawojomalisu.pdf
    • http://modarab.mygamesonline.org/diabetes_alloxan.pdf
    • http://rrrrkkkkk.space/nes_emulator_proma7mv.pdf
    • https://cdn.sqhk.co/bipuzojafa/Q10XKid/zanifazejubu.pdf
    • http://fopesekebamit.22web.org/fawusipatonewafedilaxev.pdf
    • http://radanews.site/vexafoxoj2921n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_1e899ba44206450eb8c74d3326864ff7.pdf?index=true
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_c4b6b551e1b3486aa76f6060499c69ac.pdf?index=true
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_5484fb03ba854d698e4938c12e02fd13.pdf?index=true
    • http://fibubaxuvuvixik.epizy.com/34064059802.pdf
    • http://fobupozomorefiw.epizy.com/vumuwawifuvos.pdf
    • http://mewoduzagabe.rf.gd/bronchopneumonia_in_child.pdf
    • http://watonorobawar.rf.gd/sajufivavipezavoredebo.pdf
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_43c6dfd06dca4a71873706d76c0193e1.pdf?index=true
    • http://bidasumibave.epizy.com/gilinaguvobedilemaxuv.pdf
    • https://d650f791-4ca6-4964-96f1-ba9fac0414c1.filesusr.com/ugd/adf9cb_12368639c2014d338eb6d0f096642c4e.pdf?index=true
    • 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_off0000ec75.bin
44ef1320f6550aae295b6a7c514dfef0770aac73aa9d2fcc543eedda29ac7386
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 4948 bytes
font_01_sfnt_off0000fd7d.bin
db7e6eb079204a5df29e98a02d03b0214f913af87b261a4ac5391cbfaca0e7d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 10816 bytes