Malicious PDF — malware analysis report

Static analysis result for SHA-256 9286d0f54deb3be3…

MALICIOUS

PDF

75.1 KB Created: 2021-03-01 23:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1656ea372b50b155da0dc4d898e4c9ac SHA-1: 14050b892935fba5af37fb06c6b750723b037d7b SHA-256: 9286d0f54deb3be3c93401ec318886300860c6e306cfc7a2ad8f61386ce84c4f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://resalured.ru/wix?keyword=animation+throwdown+cheats+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419628/normal_6029ff2a731f4.pdfIn PDF document text
    • http://draiwenstore.online/18969308227ey0g4.pdfIn PDF document text
    • http://kind-insta.site/how_to_get_lockpicking_wowh1hqi.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/manoxeluwodobepasise.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/hNlichd/klondike_adventures_game_tips.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471985/normal_602bf067eac64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504568/normal_5fc832aa52cc5.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/what_does_color_black_represent_in_bible.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/b0QhiJQ/71009009576.pdfIn PDF document text
    • http://tb-films.ru/52093824913bcsom.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/zavuwezizufevobolimesi.pdfIn PDF document text
    • http://skywonder.space/pacify_her_melanie_martinez_free4qfeg.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/hjbhqgh/zed_build_mid_s10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470979/normal_60157f48bd67d.pdfIn PDF document text
    • http://idealica-italiaoficial.site/rayuela_capitulo_68ahtw0.pdfIn PDF document text
    • http://instofficial.online/enyel_de_los_santos_scouting_report2r9tx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 5712 bytes
SHA-256: a3a8ac96c307744af454af5120412091ec0c3a7176f0dbaf37d801ce651c0364
font_01_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 10240 bytes
SHA-256: 2923b2351a456c59a3f0f9c63952bfe5b7c1f5d2b22e0bc46e14bc6acac00ab8