Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3bf7b2f59512f4…

MALICIOUS

PDF

75.8 KB Created: 2021-03-12 21:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc0dc939ddbfa5114850829cade51d32 SHA-1: 95a65bc1815a5de3877c1ebaf55ef724376f6fc9 SHA-256: 2a3bf7b2f59512f4cf14e3c1f451c6e681d94310f5be88fd25f2e5046c06f673
126 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, which is a common tactic for phishing or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://leonvi.ru/wb?keyword=motorola%20h700%20bluetooth%20pairing%20mode PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367914/normal_600bf390c3093.pdfIn PDF document text
    • http://ditoterelutas.sportsontheweb.net/couper_un_en_plusieurs_pages.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_601b507a3a14d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492278/normal_5fd80a8956f72.pdfIn PDF document text
    • https://cdn.sqhk.co/kidurukazag/jMKjbTy/webnovel_editors_legit.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/bWIlqhi/99230599068.pdfIn PDF document text
    • http://vsedlyatebya.xyz/95989434981tatm8.pdfIn PDF document text
    • http://bixekakazozerol.mywebcommunity.org/80130187481.pdfIn PDF document text
    • http://mimivudarevi.scienceontheweb.net/29458768827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459935/normal_6033b5169a879.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/45017487950.pdfIn PDF document text
    • http://copyrightsupport-ig.com/what_does_this_emoji_mean__from_a_guyvjjkt.pdfIn PDF document text
    • https://cdn.sqhk.co/jebavimot/hhAgjhf/bow_target_shooting_arrows.pdfIn PDF document text
    • http://circulshtangcalip.website/go_math_florida_4th_grade_textbook_onlinexd26f.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/d0b2603e-1a67-414f-b1c7-3da093a5f98b/inside_the_criminal_mind_book_barnes_and_noble.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a83ee031-7f5d-431c-8aa7-bbfbff4291bb/56306285100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b443a3e-2bae-4de7-8843-4c7c0ed48123/zukokelewasatusa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46b5cd8-9529-45c6-8f5c-c1338efcbadc/pie_chart_worksheets_grade_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a0228c9-e402-416a-b097-e03895670679/jipogelesaxorozuvibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0166d6c8-2f98-45e1-8edc-25eeebc5fc50/offender_screening_tool_scoring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b3f8f93-34a4-44d8-ad13-21e9503d171f/how_to_connect_midi_usb_to_audio_interface.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_off0000eab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 5560 bytes
SHA-256: a1d971bfaefa4cf3cc3d4e5183c754b29db8a17084727ca4442277f079251e02
font_01_sfnt_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 10824 bytes
SHA-256: eb788b1c41a9c57dcfef3c722d3fed9b5bdc684fc1c999a91ea006f5c0d66533

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