Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09226c5ec46259f…

MALICIOUS

PDF

76.2 KB Created: 2021-04-03 16:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ae1dea8f389d73c1f76087031c15c060 SHA-1: 7e8b41e51d7a39089a2bb2ee4ef59bf206d7ed4b SHA-256: a09226c5ec46259fe4e2732697d7065f4c6d403874480811145fe0c55d891c62
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to deliver malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/strik?utm_term=how+much+do+sunsetter+retractable+awnings+cost PDF link annotation
    • http://mirumumavetifun.mypressonline.com/the_stars_my_destination_graphic_novel.pdfIn PDF document text
    • https://cdn.sqhk.co/sudofeno/ijJTihm/blue_moon_light_sky_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/ggPBDlk/rojimunimumoguzafegesexa.pdfIn PDF document text
    • http://kositexujir.sportsontheweb.net/nism_series_v_c_study_material.pdfIn PDF document text
    • http://xemepuvaxeliv.iblogger.org/covenant_guide_dark_souls_3.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/pandoc_html_to_page_break.pdfIn PDF document text
    • http://paxezimusosesa.scienceontheweb.net/7th_grade_math_problems_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/iagdehi/verigiwowevubunugip.pdfIn PDF document text
    • http://vutunema.mypressonline.com/what_is_behaviorism_theory_in_psychology.pdfIn PDF document text
    • http://kuviruvada.getenjoyment.net/chemical_bonding_notes_for_jee.pdfIn PDF document text
    • http://gavefunene.22web.org/budizilanul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://raxegujanamefas.atwebpages.com/blanche_neige.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/subuto.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/visual_identity_design_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/90879693751.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/can_you_just_do_cfa_level_1.pdfIn PDF document text
    • http://kivekogifix.epizy.com/a_view_from_the_bridge_litcharts.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_off0000dc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 5428 bytes
SHA-256: e53ca6bf1f781d7f5c9af391f2cab6cd10cfd8eb6a2280605cd6fc77963b8104
font_01_sfnt_off0000ee89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 11472 bytes
SHA-256: 7a858ebdb916e11cf8213e999c6e2b7470a97d49174c385a2d637fc9a544b417
font_02_sfnt_off00011547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11547 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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