Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5b94906c3c0a12…

MALICIOUS

PDF

79.0 KB Created: 2021-04-26 13:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 788295576a6b4b3a2dbc0a6231c1dbb9 SHA-1: 2dcc0225882d53e73ff2c7cb7ac65c70016359f4 SHA-256: 5a5b94906c3c0a1251348be7ef6911b0a584ad6f4a7aa7685e881a5bfc8c8be8
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://ponafet.ru/strik?utm_term=total+gym+1500+exercise+booklet+pdf, is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an exercise booklet.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/strik?utm_term=total+gym+1500+exercise+booklet+pdf
    • https://cdn.sqhk.co/resesexiraf/Gjc6Zgi/play_truck_driving_simulator_games_online_free.pdf
    • http://gadivawiw.sportsontheweb.net/12790621408.pdf
    • https://cdn.sqhk.co/nobutowug/icggl3X/79726826263.pdf
    • http://retamos.mygamesonline.org/pdf_alternator_manual.pdf
    • http://kopaburak.sportsontheweb.net/59822957693.pdf
    • http://pawezujexas.mywebcommunity.org/baptist_favorites_hymnal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tanebani.epizy.com/19705644980.pdf
    • http://kevejabituzonub.epizy.com/kegufapuwevurexusunep.pdf
    • http://tugefewose.rf.gd/advanced_auditing_book.pdf
    • http://kejajuzajibig.rf.gd/67057051676.pdf
    • http://turuduje.epizy.com/all_spider_man_comics.pdf
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_b8ca9bd0ee204b4296a9ab1a9b533d16.pdf?index=true
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_d002837ec55b45d380849b889d0f0830.pdf?index=true
    • http://gevapugono.atwebpages.com/material_requirement_planning_journal.pdf
    • http://zowofiz.myartsonline.com/17550746374.pdf
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_9a9e9529403645fcb226c3e318214084.pdf?index=true
    • http://zilowovuv.atwebpages.com/economist_style_guide_2020.pdf
    • http://burerekel.rf.gd/54835502192.pdf
    • http://xabudavadeguvo.myartsonline.com/8976736074.pdf
    • http://guvawegudisow.epizy.com/vagevowawositetope.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_off0000f2d4.bin
a667ca7e85f6070d8fb317dd359581ba1c017b4ee65b3766d0ba06982db27fc2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 6116 bytes
font_01_sfnt_off000107a5.bin
e05d40c93cd2b9ca829923bfb94e76a2b97294a2c468e27202debef456aa62fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x107A5 11384 bytes