Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00b6412e590d5b9…

MALICIOUS

PDF

75.7 KB Created: 2021-03-25 10:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8765ce26a49629931e68ae7421e0e67e SHA-1: 7737b851b8e918f54d86cf142c283cffb5b0be1f SHA-256: f00b6412e590d5b92199952f57a88b2f753e44379cfd7754043373dc399552ec
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a malicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure for educational materials, aiming to trick users into clicking the malicious link.

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://mezovuduw.ru/wix?keyword=unit+3+worksheet+3+physics+key
    • http://trikotoria.ru/916679897rzfc7.pdf
    • http://vzroslyh.net/jizosaosrr9.pdf
    • https://cdn-cms.f-static.net/uploads/4373987/normal_604dd47e1a3f7.pdf
    • http://bolowaxo.22web.org/context_clues_worksheets_multiple_choice_high_school.pdf
    • http://xeeewq.xyz/anova_sous_vide_instruction_manual236r4.pdf
    • https://static.s123-cdn-static.com/uploads/4462036/normal_5ff9d9716e8fc.pdf
    • https://cdn-cms.f-static.net/uploads/4504554/normal_605062002deb6.pdf
    • https://cdn-cms.f-static.net/uploads/4423429/normal_602ee2d19920b.pdf
    • http://fruittea.space/dolozuzuwup1ak6q.pdf
    • http://zufonirawanowo.iblogger.org/83881182719.pdf
    • http://vumajepipixoju.iblogger.org/sinuzoz.pdf
    • http://zajidowexuret.22web.org/did_nikolai_die_in_mw3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a735394a-fe6e-4d0a-8861-438b5364045c/52987155044.pdf
    • https://uploads.strikinglycdn.com/files/22c6b0d7-8ca5-4a04-9900-b602c4e67393/6010845721.pdf
    • http://korurozebopela.epizy.com/chrome_for_pc_8._1.pdf
    • http://jusolasoxo.epizy.com/wusotijuxegotako.pdf
    • http://sanegoz.epizy.com/reliability_centred_maintenance_john_moubray.pdf
    • http://forolulazo.rf.gd/crayola_crayon_factory_instructions.pdf
    • http://zevilapipox.rf.gd/words_that_start_with_z_in_spanish.pdf
    • https://uploads.strikinglycdn.com/files/35020606-07fc-42c3-8e1f-a974ccf97f33/husqvarna_chainsaw_450e_ii.pdf
    • https://uploads.strikinglycdn.com/files/3f646280-3ab7-47bb-9d7c-6990255199f4/microsoft_office_word_online_training.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_off0000e65f.bin
1d9471b965993a46500e33fb5a857ed2140e4210d77bbd1ad8379a0b53bb3ff3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE65F 5192 bytes
font_01_sfnt_off0000f829.bin
dd4c84ec7352fdf11bb5e7c30e0c2d7409902dba508be8d1e1eecaf62629de12
pdf-font-stream PDF embedded font (sfnt) at offset 0xF829 11756 bytes