Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ca60eb1a103dcf…

MALICIOUS

PDF

184.2 KB Created: 2021-03-25 18:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: dcfa3ce59a06bbec840bf87e6f0c6177 SHA-1: 135b41444647faf4a70d63939dc7072dc1d63cd5 SHA-256: b1ca60eb1a103dcf09e0b6b3ba4fd5403db2955e1998e25ea17786a58e2f49fc
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=ps+vita+slim+games+list PDF link annotation
    • https://cdn.sqhk.co/lewemimi/b5pjdTk/blast_beat_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/jj7Moif/movistar_esports_peru_en_vivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_6035ff5a37ec5.pdfIn PDF document text
    • http://balifruit.com/alarm_clock_2_mac_downloadg8qqk.pdfIn PDF document text
    • http://dawexefif.getenjoyment.net/from_third_world_to_first_drive.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/cicI55U/directv_vikings_game_today.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/ja3E6he/playmemories_home_sony_a6300.pdfIn PDF document text
    • http://babbieshop.ru/75051700778rjq00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_603a15b39f3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5fe91fdd5897a.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/vIjcmii/horizon_flight_simulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471253/normal_602f6c927d593.pdfIn PDF document text
    • http://cetop.xyz/dogobajuketarbpmx8.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/0ohghgy/52982226909.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/NzhbY4V/5734028332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_603cc6863d0f2.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/ghapjjL/vijas.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/popilo/zixumezobatelunovutur.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/axa_variable_annuity_beneficiary_change_form.pdfIn PDF document text
    • http://zedebegeku.myartsonline.com/descargar_plano_metro_barcelona.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B02C 77076 bytes
SHA-256: 4a3c535399ff6fc9fbae798d0b6e5818392cd1e2b93d51162593c34d3fe4ed1b
font_01_sfnt_off00029807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29807 4972 bytes
SHA-256: 93dd43cc8b6827ea4137b0e313f26be24739bc944a3c7aba88af5f80aecb2ccf
font_02_sfnt_off0002a8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8E7 12880 bytes
SHA-256: 63f8964e925bb21462295f395e20a631e830c2b8fd8484f5aa789e0f3b8de2da

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