Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c87e8021abd835…

MALICIOUS

PDF

64.4 KB Created: 2021-02-13 09:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: ef1ffd58cf6e1c976024207e8e90b635 SHA-1: 1a74f56ec7223b18a6729a865cb93d79df5e6edd SHA-256: d7c87e8021abd835a363b7f9d59a6f68fa9939b75d75406c4c0aedab281d490d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/shook?utm_term=devotional+mp3+ringtones+free+download+telugu PDF link annotation
    • https://cdn.sqhk.co/kafufojugure/jaBjer4/real_casino_free_vegas_casino_slot_machines.pdfIn PDF document text
    • http://lnstagram-blue-badge-form.com/beduxobosewelakubkwc6q.pdfIn PDF document text
    • https://cdn.sqhk.co/moleselofa/IicKgeg/63455796156.pdfIn PDF document text
    • http://forsage.pw/250537278325ngn1.pdfIn PDF document text
    • http://draiwenstore.online/xozevoposalumijevu5bs2t.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/9fb7a2e74d.pdfIn PDF document text
    • http://mattelipsticks.site/darlinghurst_school_ofsted_report_20168if6e.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvonazavo/ibgdcJ4/flsun_3d_printer_price_in_sri_lanka.pdfIn PDF document text
    • https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/xinazodolij.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/ZrheCMP/sunday_school_lessons_prayer.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/378885.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/basikogi7pwtw.pdfIn PDF document text
    • http://bluetea.space/zomutujuxapafol1qy63.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/PMNhggd/47944332078.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nowaginog.epizy.com/zuxado.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_off0000bddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDB 5676 bytes
SHA-256: 890d0ac6354270606940a72ca13eb67b7299b3fe06ffbea0ece7a75cc826ce1c
font_01_sfnt_off0000d133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD133 10608 bytes
SHA-256: d19d3b45851e24e523e11a620b2b718f9db5db632f61b39b0f5b2cc8b7c71379

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