Malicious PDF — malware analysis report

Static analysis result for SHA-256 972aec810858a4f8…

MALICIOUS

PDF

77.3 KB Created: 2021-01-31 15:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ef6fef63bfacd7f26e0dee0b9a0d5d48 SHA-1: 87caf118590ffcbc8f0a748b051c2c8d4f99be98 SHA-256: 972aec810858a4f845ec8f1062385a73dc3273785909393993ec8ccc71ce4352
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to resolving hard disk errors, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/123?utm_term=3rd+master+hard+disk+error+como+resolver PDF link annotation
    • http://sait-ok.ru/best_real_time_strategy_games_xbox_ones110e.pdfIn PDF document text
    • http://usblighter24.site/sample_descriptive_essay_about_my_motherpkt92.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/fDqjawP/mad_dragon_defense_hack_appvn.pdfIn PDF document text
    • https://cdn.sqhk.co/widiroje/hgqWbjc/supibiwodojivi.pdfIn PDF document text
    • http://greatholl.com/venidoxixobrvx0.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
    • https://s3.amazonaws.com/wanasuvedigo/gowapu.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/motiginanovadamotowug.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/34002417966.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/japakavasinepewodaf.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/tuxititibitanipitog.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/kazawejolov.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/dredgen_seal_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/tikirisopurujamanik.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/pulled_piriformis_muscle_pregnancy.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75D 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 5052 bytes
SHA-256: f40d3ee72276e119b43225dcb51bd9c053ea33e443c31a6836dea9a1e45a436a
font_02_sfnt_off0000f2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 10744 bytes
SHA-256: 9d7e2a64357e61fea1b46e0c37b94f2bc3eb958ff6c7bb5419cccf6370c264db
font_03_sfnt_off000117b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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