Malicious PDF — malware analysis report

Static analysis result for SHA-256 3badf6cfbeb7cc8f…

MALICIOUS

PDF

80.6 KB Created: 2021-02-23 08:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d7280677b6f1bc878b48092f0c8c74bd SHA-1: 1f177e8e215bbc1fa0646d89c3f6d0d782445da7 SHA-256: 3badf6cfbeb7cc8ffb54a3f6dba5dbb40632fd218ff0961c4c5ec7c3b1775b06
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the use of disposable hosting and link farming tactics. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=holonomic+drive+programming PDF link annotation
    • http://olipaka.xyz/ranzcr_guidelines_for_iodinated_contrast_administration01kdo.pdfIn PDF document text
    • https://cdn.sqhk.co/zovigobut/17X5HEk/hattricks_tampa_happy_hour.pdfIn PDF document text
    • http://wokulorumal.iblogger.org/adirondack_fall_color_report.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/gcuiaqc/jivalekelidogum.pdfIn PDF document text
    • http://myimperfectmomlife.com/914332142496h31u.pdfIn PDF document text
    • http://kalavar.xyz/water_park_slidesm6yua.pdfIn PDF document text
    • https://cdn.sqhk.co/tokotuxajif/eihA8lB/optical_illusion_tattoo_patterns.pdfIn PDF document text
    • http://paktum.pro/fisher_price_jumperoo_rainforest_seat_coverjm9km.pdfIn PDF document text
    • http://servisvds.ru/fukafukunujaxuperadalass098.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/didwjjr/kivuzekokekaso.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/2006_bmw_330xi_specs_0-6071v58.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/how_can_i_charge_my_samsung_tablet_without_a_chargerwpdii.pdfIn PDF document text
    • http://puviwaxeraw.22web.org/95594081084.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/Lhagf1R/diy_woodworking_projects_easy.pdfIn PDF document text
    • http://xajoraxi.22web.org/beledoxunuvutem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tajafex.rf.gd/islands_of_decolonial_love.pdfIn PDF document text
    • http://musovinudebepak.epizy.com/certified_information_systems_security_professional_study_guide.pdfIn PDF document text
    • http://supovopekowo.epizy.com/envato_elements_er.pdfIn PDF document text
    • http://juletonos.epizy.com/musatuludejugexejopeva.pdfIn PDF document text
    • http://palakojum.rf.gd/bulletin_of_earthquake_engineering_template.pdfIn PDF document text
    • http://tivekanudoz.rf.gd/25546957277.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/xuloleforijokej.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_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 5236 bytes
SHA-256: 2d2fc8807382071e305f1c1026a6bb81b7816d358bd78eb03160e6e1f6045d16
font_01_sfnt_off00011072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11072 10796 bytes
SHA-256: d4f4ec6b0d0c6b1b3ca2e8f59b31c281334f2bb5610b01cb23879da4b25ae93c

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