Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88881f546f18c04…

MALICIOUS

PDF

76.3 KB Created: 2021-02-07 07:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c7c2dfe182999baeaf79cc78ebba11e4 SHA-1: 92a7b76048b3bcfc3d200c33cd4712c7f9545be1 SHA-256: b88881f546f18c049f3c040cab4aeead9f4c07c8662da24904507d614eb4a015
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 URL that directs users to a suspicious domain, likely to host a malicious payload or redirect to a phishing page. The document body, though heavily obfuscated, suggests a lure related to media content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wb?keyword=baba%20black%20sheep%20mp4%20video%20free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490371/normal_5ffe8310be33f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416806/normal_5fe279f0b9e94.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/ifigKqL/govokow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484375/normal_5ff38bfd829d8.pdfIn PDF document text
    • http://dafilor.iblogger.org/fixel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392664/normal_6003e31c892b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387242/normal_60035de198e54.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/qDiez3T/synthesia_free_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454820/normal_5fd74fc81015b.pdfIn PDF document text
    • https://cdn.sqhk.co/seworani/ppggsjg/zombie_defense_battle_of_death_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425501/normal_5ffd72ed90e2e.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/hijgfzr/loteliladovidubelopofazox.pdfIn PDF document text
    • http://futubog.22web.org/wekasatitiritojo.pdfIn PDF document text
    • http://xevoxisukima.22web.org/balochistan_board_fsc_2018_date_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kilubediboxut.rf.gd/xitikonemofifoterar.pdfIn PDF document text
    • http://firotiz.epizy.com/gi8014_geographic_information_system.pdfIn PDF document text
    • http://zarenubopopo.epizy.com/senorita_piano_sheet_music_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55D 5400 bytes
SHA-256: 13b7564021a756c727d3295b669b945b60258280e27cdb11f9c7b9588f5a09e5
font_01_sfnt_off0000d7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 10776 bytes
SHA-256: 945b255752c6afdc18ef5a4081c026a6a5e6b7e96969269f100039fe75f2e2aa
font_02_sfnt_off0000fceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEB 17300 bytes
SHA-256: d07845b8d754cc2b16f2ad5f3e5ea5ba93251e2e31ae72cc02db5f84e28282aa
font_03_sfnt_off000115cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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