Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2ca95c60356e31…

MALICIOUS

PDF

70.0 KB Created: 2021-04-13 20:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b99cceed10f2ea412b74e66308dff4f5 SHA-1: eb92d8a3bca06d806cb3e94a81b0cc724f2f6fe1 SHA-256: 1b2ca95c60356e319650618406a82fcf6d111ea2c22b95bdec994205a1308a8d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be a product listing, suggesting a lure to trick users into visiting the malicious URL for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=starcraft+15x15+8+in+1+swing+away+heat+press+-+turquoise PDF link annotation
    • https://cdn.sqhk.co/fasazani/fUgdtgd/76173169672.pdfIn PDF document text
    • https://cdn.sqhk.co/xatijafuwami/bvgdbhg/t_mobile_product_manager_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/RlgVuid/nifejozij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375340/normal_5fdfcf403df0c.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/JV9jjeO/mediamonkey_iphone_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_6031579410a23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_5fe759756c0d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_601959ffa8a56.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/ehvgieq/34271573336.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/4gfigP2/xarifagonuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369307/normal_600286eef0d0d.pdfIn PDF document text
    • https://cdn.sqhk.co/binebelezux/bifbjfq/strategy_war_games_ps4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d9d2001-4790-44d2-a017-657ef2a6ed5d/french_to_english_dictionary_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/91042381011.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/baskin_robbins_job_application_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/instructions_on_how_to_use_a_prestige_pressure_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b553537-8c91-4d37-96fe-18e0aaba1d5e/26572923657.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/94287154573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b34823f-d61a-478d-b5f1-855b2090333c/swiffer_wet_jet_coupon_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/b_el_ed_admit_card_2018.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_off0000cd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0B 6140 bytes
SHA-256: 9e2142185c589a676e7ff83c313e5ecab57d649b46c551e9e2bdc3e44280143b
font_01_sfnt_off0000e20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20E 11676 bytes
SHA-256: bef46dd48d6b41d83240ad8b1e2e7b9377f1a60838e563fe7834f6d53b8e46b7

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