Malicious PDF — malware analysis report

Static analysis result for SHA-256 23132793c0e56682…

MALICIOUS

PDF

80.4 KB Created: 2021-02-20 14:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ae64fef0885b291ea6121dfe1204ae5c SHA-1: ed2933ed248e4b3212235b39f7474eab24ca67c2 SHA-256: 23132793c0e56682fa685ddfba360e48b08c748433df31d3e4ec8ab093cea774
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'jacksth.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with common phishing lures.

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/123?utm_term=honda+mower+hrx217vka+air+filter PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468836/normal_6001bb41837c7.pdfIn PDF document text
    • https://cdn.sqhk.co/rokunufoleti/dja7jcl/galaxy_strike_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/OVjazha/hangman_2015_movie_explained.pdfIn PDF document text
    • http://counterman.ru/le_management_des_risques_de_l_entreprise7dzt2.pdfIn PDF document text
    • https://cdn.sqhk.co/zajagatetode/I3hfDjg/diduxefekelezowivalolapa.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/82Ozjet/1093840670.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/gToijY7/krabat_film_stream.pdfIn PDF document text
    • https://cdn.sqhk.co/vebapejun/hbid2CK/xitunetuvuwopitijoxibeje.pdfIn PDF document text
    • https://cdn.sqhk.co/zawileveruz/fiajeXE/secret_agent_prison_escape_mission_2019.pdfIn PDF document text
    • http://swast-group.website/necromancer_eso_build_2020z3vk0.pdfIn PDF document text
    • https://cdn.sqhk.co/gabogivoxavi/whfZW44/51274046726.pdfIn PDF document text
    • http://peskomment.ru/corrida_gumball_3000haq91.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/jjjdhib/8437909022.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/meludav/world_cup_2019_date_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/sawisela.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/tufulofuvem.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/mibojiteriwokenabim.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/causticizing_process.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/iso_8601_date_format.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 5480 bytes
SHA-256: eadd261cc225c868e5ae21f1e3304ee77a4293fab94fa8e975b1379297c2a949
font_01_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 11712 bytes
SHA-256: c74e8a92c1a3e144c8328f9c1078abbb63c89f5a36c7d69ebcc72d5674dfb8c9

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