Malicious PDF — malware analysis report

Static analysis result for SHA-256 522aeb9a04bb515d…

MALICIOUS

PDF

81.5 KB Created: 2021-02-20 02:37:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba6a9efe17b27dcba4ede859ee9ad3d0 SHA-1: 12d329c1988999ce9f4d44e06c92d58a9e123cdc SHA-256: 522aeb9a04bb515d47af476a41ce29196454acfe5ba857b3615eab5377337542
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, one of which is `https://jacksth.ru/wix?keyword=you+should+be+a+witness+gospel+song`. The document body, though heavily obfuscated, appears to be a lure related to gospel music. The ML classifier and ClamAV detection strongly indicate maliciousness, likely a phishing attempt or a downloader disguised as a document.

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://jacksth.ru/wix?keyword=you+should+be+a+witness+gospel+song
    • https://cdn.sqhk.co/penunotati/iGiNih3/23907919657.pdf
    • http://eslivdrug.space/difference_between_platform_events_and_streaming_api9m8tc.pdf
    • https://cdn.sqhk.co/rujiwujik/ggjd6ih/old_time_gospel_songs_lyrics.pdf
    • http://latencfsrt.space/zekoludopopovavogowusoler8od2h.pdf
    • https://cdn.sqhk.co/zovitamojim/igilja3/lewegege.pdf
    • https://cdn-cms.f-static.net/uploads/4478133/normal_601b8b45e794b.pdf
    • http://dazenad.iblogger.org/california_investigative_consumer_reporting_agencies_act.pdf
    • https://cdn.sqhk.co/zebimapajod/jfUiihi/vazudabubarej.pdf
    • https://cdn.sqhk.co/jigekuragige/P9gcsLA/aquapark_io_mod_apk_uptodown.pdf
    • http://8bitbeardsco.com/74172930007cd7po.pdf
    • http://healthit.space/did_judy_garland_sing_somewhere_over_the_rainbow_in_the_wizard_of_ozjn1kc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rijaliwiguvex/90647612606.pdf
    • https://s3.amazonaws.com/fogibi/how_to_learn_data_science_for_free.pdf
    • http://mafonoxerinomif.epizy.com/william_tell_overture_finale_piano_sheet_music.pdf
    • http://zarevamemamafo.rf.gd/template_function_signature_c.pdf
    • https://s3.amazonaws.com/tiduro/wokuxokogadopunetibug.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_off000102ba.bin
60068ea57eae96c4f9879bfb46c842c458debb57400a27c6a6fd2b4f2c2d89bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 5316 bytes
font_01_sfnt_off000114df.bin
2b1498a7402ab079a591694ed6404601dca0c970be72b6fefc5adefa00cdc125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114DF 10576 bytes

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