Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5442627b4908f9…

MALICIOUS

PDF

84.9 KB Created: 2021-03-17 20:51:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84f7890e3a6c94b80c444725532f7dc2 SHA-1: be48c89152a80449b4860287b1c987eccc901dfc SHA-256: 5a5442627b4908f922b1f8b2f3f51b02b02c880a5f4542f94d5847a9f382f660
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search terms, aiming to trick the user into clicking the malicious link.

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://seumenha.ru/strik?utm_term=roku+32+inch+tv+dimensions
    • http://mugukix.mygamesonline.org/feng_shui_2020_for_pig.pdf
    • https://cdn-cms.f-static.net/uploads/4458132/normal_600a74dcd9574.pdf
    • https://cdn-cms.f-static.net/uploads/4416798/normal_600d5e0fc9446.pdf
    • https://cdn-cms.f-static.net/uploads/4404103/normal_600d3e5054051.pdf
    • http://futajef.medianewsonline.com/dalexijadavufiwuragov.pdf
    • https://static.s123-cdn-static.com/uploads/4365553/normal_5fe0921734c1c.pdf
    • http://wunadimizurened.medianewsonline.com/zowisavegasute.pdf
    • https://cdn-cms.f-static.net/uploads/4458826/normal_600b5b91c1473.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vilatelisoto.onlinewebshop.net/tozaliga.pdf
    • https://uploads.strikinglycdn.com/files/ebbafe1f-b850-4888-8607-1d7c571c470f/ms_excel_formulas_tutorial_ppt.pdf
    • https://uploads.strikinglycdn.com/files/9dc04524-a205-4a41-b167-732812a7d324/nuloturuxofinoxafetamofo.pdf
    • https://s3.amazonaws.com/wexukufedepim/annamayya_sankeerthanalu_audio_songs.pdf
    • https://uploads.strikinglycdn.com/files/28e7acf2-b054-41ca-b591-70a9ae55c046/what_is_project_zorgo_name.pdf
    • https://uploads.strikinglycdn.com/files/411feeac-8a7f-4681-aa73-0be69f9fba38/what_is_the_ideal_gas_constant_value.pdf
    • http://bopubedoru.myartsonline.com/apprendre_l_criture_arabe.pdf
    • https://s3.amazonaws.com/rufonali/fuzogusuzapijod.pdf
    • https://uploads.strikinglycdn.com/files/fbbdf40b-c23a-4cd5-8790-02a653858bda/one_up_on_wall_street_audiobook_unabridged.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_off00010c96.bin
33bfb65873a4626c3311217e54a246c927a8b234131fcafe28eedd3973275e33
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C96 5268 bytes
font_01_sfnt_off00011e6d.bin
c8c6ea7427518c37618660b7e85520c9af2440ea718d6351458cf849d39422e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6D 11416 bytes