Malicious PDF — malware analysis report

Static analysis result for SHA-256 b702b93b347eb344…

MALICIOUS

PDF

78.3 KB Created: 2021-03-30 11:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e57d3768b0b0ffd5b13316ed3ed8a32 SHA-1: ed5bef1dea32974a1ab2652e5f941e3e9e8ad879 SHA-256: b702b93b347eb344f83b805c83e55cb5678e970a65195e0209a2efa5a6042a0c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'golowaki.ru', which is likely the malicious destination. The document body, though heavily obfuscated, appears to be a lure related to 'Pathos ethos logos definition', suggesting a social engineering pretext.

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://golowaki.ru/wix?keyword=pathos+ethos+logos+definition
    • http://usacarins.com/charting_and_technical_analysis_download1us97.pdf
    • https://cdn-cms.f-static.net/uploads/4388405/normal_603e6a6b99991.pdf
    • https://cdn-cms.f-static.net/uploads/4426820/normal_605595feb47de.pdf
    • http://sogikujuwawim.22web.org/91661936239.pdf
    • http://spiritstudio.ru/java_resttemplate_x-_www-_form-_urlencodedzzyjl.pdf
    • http://gexafozo.22web.org/agent_administratif_formation_montreal.pdf
    • https://static.s123-cdn-static.com/uploads/4379613/normal_5ffba65b2c407.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/204820ba-d418-4f2d-9375-4c490f460203/nifuf.pdf
    • http://fogigekitomug.rf.gd/the_yoga_cbt_workbook_for_anxiety.pdf
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_5f5d63600f5f49919bb40962d5aa53a0.pdf?index=true
    • http://kulotobokibipez.epizy.com/one_ones_other_another_exercises.pdf
    • https://uploads.strikinglycdn.com/files/fbd6cff6-a16e-43b5-89af-e1c5760b6f14/top_hip_hop_songs_2010_to_2019.pdf
    • https://uploads.strikinglycdn.com/files/f44301d6-575a-47cf-a8d1-58ae661928e5/50983392284.pdf
    • http://buposubugoromot.rf.gd/doxofagil.pdf
    • https://uploads.strikinglycdn.com/files/ef842764-3150-4c0f-9742-d9f837cf9a07/3262279125.pdf
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_82f11085cd944bf0b11f84c26550917d.pdf?index=true
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_af548de6f5c3486181c379f8f3cdbdb9.pdf?index=true
    • http://jomedive.epizy.com/binomische_formel_rechner_rckwrts.pdf
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_21c73cb0741b4ecf87cf43fb749bc583.pdf?index=true
    • http://besikinugid.epizy.com/90098514751.pdf
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_c4f1f0849fad482db41b00d6bb11dc06.pdf?index=true
    • 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_off0000f673.bin
99533da7c331e0f006ef2692b7deffa8a4b8527dea3abe62840f544bb1af8d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF673 5072 bytes
font_01_sfnt_off000107b6.bin
5285e42cfaaa539d32548338a4e2e69cddf3e87e6c7b08f12c9b023873567fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107B6 10816 bytes

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