Malicious PDF — malware analysis report

Static analysis result for SHA-256 98de73a70fc33ac5…

MALICIOUS

PDF

78.2 KB Created: 2021-02-15 07:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 770c1e0b6dce6e88f76ea4a29eaf431e SHA-1: 9cfc5a99c7fe1688c018b92c162f1c0d4c0477b0 SHA-256: 98de73a70fc33ac5325358bbd1767a286a614436932b4d703e879b16f7965aff
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, which is a common tactic for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to game information, directing the user to a suspicious URL.

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://baarspo.ru/wix?keyword=borderlands+pre+sequel+best+skill+tree+for+jack PDF link annotation
    • http://appletopshop.ru/superior_spider_man_comicjzvm1.pdfIn PDF document text
    • http://opensalon.xyz/popufonokodivowujirigugbr28.pdfIn PDF document text
    • http://miiliioner.xyz/el_libro_de_los_simbolos_rudolf_koch_descargar_gratisul44u.pdfIn PDF document text
    • http://tipografiyav.moscow/5_barriers_to_effective_listeningdpw91.pdfIn PDF document text
    • http://the-job.ru/41189922120oiodl.pdfIn PDF document text
    • http://moperala.iblogger.org/tiwizukakemusivumis.pdfIn PDF document text
    • http://varerafuvurine.22web.org/wipogesijibofuremaw.pdfIn PDF document text
    • http://studytogether.fun/2009_buick_enclave_owner_s_manualiqrcr.pdfIn PDF document text
    • http://topdouche.xyz/avengers_3_trailer_free_sabwap._com8aia4.pdfIn PDF document text
    • http://spoonnumberone.xyz/dadobofurumupavuxe6pk3u.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/zolerazowubow/best_movie_tv_shows_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/koxovam.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/adobe_animate_cc_2015_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/vujefogabuli.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/27336479232.pdfIn PDF document text
    • http://kupemamenigasi.rf.gd/jonegavokuxafujisegiwegu.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/crossword_answer_heap_praise_on.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/total_shoulder_arthroplasty_protocol.pdfIn PDF document text
    • http://javidukasomeg.epizy.com/64975967406.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/70817338332.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_off0000f460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF460 5604 bytes
SHA-256: 3cf20c7570495c33e63c963036416e17b4816b201120f4b40843ad1a8f54d064
font_01_sfnt_off00010781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10781 10408 bytes
SHA-256: 2eacb27964fa6dfefc6e71d0b100573e453a7b351f25eaaa292ff8b8f1699a54

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