Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e497eafa291a7f…

MALICIOUS

PDF

77.7 KB Created: 2021-02-22 14:12:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 88dbd3746d49b7275776022289ba60d2 SHA-1: cecc89efc847dee28c51038a30a3f877268f2bce SHA-256: 81e497eafa291a7f255896cc1a975942b96be0c8cbea8206bdb4eb1e237c8ea2
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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=does+family+dollar+sell+dog+clothes PDF link annotation
    • http://boost-store.net/4g_lte_broadband_router_with_voice_manualo0b2m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490377/normal_5ff58893e18e7.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/iha74hc/pawn_stars_the_game_most_expensive_item.pdfIn PDF document text
    • http://keksik24.ru/the_wonderful_wizard_of_oz_script_play1jrn9.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/hhgdjeL/marco_s_pizza_stillwater_menu_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/hcGRSdg/rc_airplane_simulator_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/dCCifhf/kanto_region_places_to_visit.pdfIn PDF document text
    • http://fakts.design/wowaliziziwujenobigofoxon7t.pdfIn PDF document text
    • http://kvrovk.xyz/52974761377hwuec.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/gotenukevepunin/camrose_morning_news_police_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/64312173164.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/fractions_decimals_and_percentages_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/35802536107.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/folagegulesetatenuwekefik.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_off0000f442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 5536 bytes
SHA-256: 1b733dc4eab618bf5371a15dc263b64e1fef5a136c09c4b207aa8ce6bc8786c0
font_01_sfnt_off000106fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FB 10296 bytes
SHA-256: d6c4882234607beaaa6692d62163930601b5befb5fd5e2fd34c82ff5a92f2ea1