Malicious PDF — malware analysis report

Static analysis result for SHA-256 d851eb8bf61fd665…

MALICIOUS

PDF

75.5 KB Created: 2021-04-26 09:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e2b263cea3a161e50d4f3999ce1f04a SHA-1: eb222ccbd7b9a11b961bf79565abd9aa6e062a8e SHA-256: d851eb8bf61fd665ba289dc96b9ce199d098d4eef057cf8b5f570843e6a1676c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL `https://pelibifir.ru/strik?utm_term=it+starts+with+food+audiobook+free` suggests a phishing or malware distribution lure, disguised by a title implying free content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing or downloader pattern.

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://pelibifir.ru/strik?utm_term=it+starts+with+food+audiobook+free
    • http://ryursew.space/nonlinear_ordinary_differential_equationsqop76.pdf
    • http://itawegan.fun/garmin_approach_s62_buyzcwbf.pdf
    • http://dazuxej.22web.org/descargar_biblia_textual_4ta_edicin.pdf
    • http://goxezidoge.22web.org/polusuketaridarisisuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ba387b94-217c-43c4-8493-d0916ced4625/rosixowofuriluxu.pdf
    • https://uploads.strikinglycdn.com/files/37a1115d-fadd-4d94-b70a-a3b2829f9615/financial_statement_analysis_icai.pdf
    • https://uploads.strikinglycdn.com/files/f6a71943-d808-4cf7-998d-b44ccf295b11/37503968068.pdf
    • http://zunebafovako.epizy.com/59261538458.pdf
    • https://uploads.strikinglycdn.com/files/b38b5737-1d57-4e1f-8a18-86701a727aaf/dressage_intro_test_a_2020.pdf
    • http://gesesasogibigaw.rf.gd/xezudivasesodul.pdf
    • http://sujosivetobifir.epizy.com/72244358299.pdf
    • http://wepirizifomonij.epizy.com/william_shakespeares_romeo_and_juliet_1996_full_movie_online_free.pdf
    • http://menutewewunidov.rf.gd/49760232614.pdf
    • http://xozurugef.epizy.com/rexoveviperobobopaguka.pdf
    • https://uploads.strikinglycdn.com/files/57892ad5-eee1-4bc7-9d40-880d6701c8bf/baritujogur.pdf
    • https://uploads.strikinglycdn.com/files/b57eceec-4636-459c-9f2d-df17af96ea17/limites_de_identidades_trigonometricas_ejercicios_resueltos.pdf
    • https://uploads.strikinglycdn.com/files/729c46c3-c7c1-4837-bf2c-ee8f27e7b06d/honda_fit_cvt_transmission_repair_manual.pdf
    • https://uploads.strikinglycdn.com/files/c6093f08-ea16-4a7e-859d-6c497718ec24/zafinuzu.pdf
    • https://uploads.strikinglycdn.com/files/27e57eeb-808c-4968-b28d-66dda5b40c94/laxilaxidikupipi.pdf
    • http://botemunem.epizy.com/what_kind_of_battery_does_a_g_shock_watch_take.pdf
    • https://uploads.strikinglycdn.com/files/e35ef735-9f08-4170-9039-999f769eb7fe/a_christmas_carol_2019_movie.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_off0000ea31.bin
f5e220ece6ff84bee020f29d51b471dc0aa35fe28956966529690403fa370ae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 5196 bytes
font_01_sfnt_off0000fbe5.bin
7f4a9faaebc807bc29835746b0d6d5e9ab6a953a644caee65e6539839e80e8ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 10708 bytes

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