Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b0c12665964c15a…

MALICIOUS

PDF

72.4 KB Created: 2021-02-28 17:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c4329468fbc944b31f8d038269eb544b SHA-1: 66fe74ad4745721c01de4c8ac53ff4b58a8ff7cb SHA-256: 4b0c12665964c15ad11ccb9484eb559bfa1f346ca903cc44b074829dab245680
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=how+to+fix+xbox+one+controller+charging+port PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417226/normal_601a59e62346d.pdfIn PDF document text
    • https://cdn.sqhk.co/lukejisuvawe/TGIzhgx/new_ringtone_samsung_galaxy_s8.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/dhgicnz/12542570262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5ff85e4c67272.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421339/normal_5ffbe296619d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422640/normal_5fcad177938eb.pdfIn PDF document text
    • https://cdn.sqhk.co/dufolatik/cw1jjha/ticket_to_ride_first_journey_vs_europe.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/kjivAhe/907340825.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/WC7gcqT/bosaketibeges.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460465/normal_5febf9a2da38d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_6019ab5674702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414172/normal_6028f6399731e.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/zafirawit/xelofetun.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/68294987597.pdfIn PDF document text
    • http://xufagorefupafov.rf.gd/valijudosovatipi.pdfIn PDF document text
    • http://sugexure.rf.gd/finpack_balance_sheet_example.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_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 5360 bytes
SHA-256: e6dff96b3decb022d7a3c7c0d0391d36e0946d6150a12907bbe77d82b1ff03e7
font_01_sfnt_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 10612 bytes
SHA-256: 8cb9c81d71a8a0ce4d9dca6668ac0676b7c078e7fec9def82479e4e065eca121