Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22d8c999675ceab…

MALICIOUS

PDF

77.7 KB Created: 2021-04-08 09:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4229617e8cc47857abf1074aa536af04 SHA-1: 71edc644209e346a54eb5dc3609f54431ac80906 SHA-256: e22d8c999675ceab6ad3f5faac36a71877c466147b6badc32dafe08f7cf048ba
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a malicious domain used to host or redirect to a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a common household item to entice users to click 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://vilenefex.ru/strik?utm_term=how+to+program+black+and+decker+thermal+coffee+maker
    • http://saporik.scienceontheweb.net/liturgical_year_worksheet.pdf
    • https://cdn.sqhk.co/pilozarager/cjeifha/alkaline_trio_crimson.pdf
    • https://static.s123-cdn-static.com/uploads/4459921/normal_600919e7c88bc.pdf
    • https://static.s123-cdn-static.com/uploads/4448984/normal_5fca3d4172e20.pdf
    • http://davebamonuzove.medianewsonline.com/cfp_study_material.pdf
    • https://cdn.sqhk.co/xawobovuji/fmfviUj/xifumobitarasumuraka.pdf
    • https://cdn.sqhk.co/kebabefepu/sqjb1gc/statistical_quality_control_mahajan.pdf
    • http://judupebe.getenjoyment.net/xuvapu.pdf
    • https://static.s123-cdn-static.com/uploads/4408702/normal_5fddf5a621466.pdf
    • https://cdn.sqhk.co/liminekaj/LicPygi/dopediwowuvuxovesedazuso.pdf
    • https://cdn.sqhk.co/bitijude/bhhigvp/secondary_high_school_classroom_management_plan.pdf
    • https://cdn.sqhk.co/kepozote/Z1Ghahd/80_s_90_s_music_online_radio.pdf
    • https://cdn-cms.f-static.net/uploads/4489244/normal_606e587d32b36.pdf
    • http://kiritisivasol.mywebcommunity.org/90204652980.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mulerux/antec_performance_one_p8.pdf
    • https://uploads.strikinglycdn.com/files/79f9e05a-e9a9-41e9-9d33-675b3752d4df/99352292162.pdf
    • https://uploads.strikinglycdn.com/files/541d8876-ca76-4242-b7cb-8f5c673afffc/88401795041.pdf
    • https://uploads.strikinglycdn.com/files/4e9042ba-69de-4100-81d2-52297e1af862/61543335819.pdf
    • https://s3.amazonaws.com/liwara/android_auto_compatible_cars_2017.pdf
    • http://sinusudixuxuwad.atwebpages.com/fallout_4_perk_chart_levels.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_off0000f178.bin
37a7eafd43aa874de8de21f2b59c85101f3f6e6d622cde6c6cfb4c423163fa50
pdf-font-stream PDF embedded font (sfnt) at offset 0xF178 5648 bytes
font_01_sfnt_off00010497.bin
dc6b5b70b82fb8a362ed946e2f581e5a6134ae0a572448c89840f08cebf6bc62
pdf-font-stream PDF embedded font (sfnt) at offset 0x10497 10748 bytes