Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04b9f35737f8b93…

MALICIOUS

PDF

77.4 KB Created: 2021-03-23 08:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17f88375b42a4fc60cabb2c911d86a1b SHA-1: 2725eb3c004a4bcc34b08bc57a60e7e720b727c8 SHA-256: e04b9f35737f8b933d6eca1ad13528dc9ff9d745e33b5f3138ae652bc25903f3
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://golowaki.ru/123?utm_term=kinemaster+green+screen+template', suggesting a phishing or malicious redirection attempt. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear textual lure. The presence of multiple unknown and potentially malicious URLs further supports the phishing classification.

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/123?utm_term=kinemaster+green+screen+template
    • http://kmplitka.shop/dd_5e_homebrew_monsters5bmu5.pdf
    • http://tugokutuli.scienceontheweb.net/avionics_certification_test_study_guide.pdf
    • http://prizinsta365.online/better_than_before_organizingf5sxt.pdf
    • http://masezigo.iblogger.org/14133513875.pdf
    • http://pornbustyvids.com/para_que_sirve_el_cianuro_en_quimicaoppl9.pdf
    • http://zhigina.ru/does_el_pollo_loco_have_tortilla_soupp5boi.pdf
    • http://maddot.space/207229687927kz8q.pdf
    • http://znakomstva18x.site/twilight_summary_book_4w1yw5.pdf
    • http://salleapp.xyz/wayne_dalton_garage_door_repair_charlotte_ncc344k.pdf
    • http://kesimaseduwedob.22web.org/rugipidex.pdf
    • http://arendaavto.taxi/162716843091hvay.pdf
    • http://niwizonoleror.mywebcommunity.org/citizen_eco_drive_calibre_8700_manual_set_date.pdf
    • http://gosoxegekiri.mywebcommunity.org/carta_de_derechos_de_puerto_rico_resumen.pdf
    • http://vidclips.design/nufosamirededl6iod.pdf
    • http://toxipoxekej.medianewsonline.com/cabelas_commercial_meat_grinder_parts.pdf
    • http://maska-respirator.com/miginukutusurivilbdqr6.pdf
    • http://theharaka.online/duvabodubavadobodah6l4r.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bujazux.rf.gd/half-_yearly_economic_report_2019.pdf
    • http://lurarapekakaka.atwebpages.com/assumptions_in_qualitative_research.pdf
    • http://vedixemalirugi.atwebpages.com/jetuxufusebukazizapev.pdf
    • http://wokikeka.epizy.com/83438973287.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_off0000f2b5.bin
e54e8ba09ad12373cd9ed7cf0efca226d8db15fa990d2b78f1963a1181a2bea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B5 5224 bytes
font_01_sfnt_off00010465.bin
a4187f1b5d4fa607938815e3ea1020fd5e369e694bfdc51699df9b94c944d774		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 10544 bytes

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