Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbc15347d846488…

MALICIOUS

PDF

88.9 KB Created: 2021-03-28 14:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 41e1379f73ea0f1e00d5d7c34d5e12ff SHA-1: ef4a1a2dbf673c9ca5c5e8064ab37494726a80c3 SHA-256: 3dbc15347d846488849143e4ded941ab0e658d564c9ad2f8df96886a8f8f90f5
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/strik?utm_term=what+is+lean+ux+methodology PDF link annotation
    • http://relax35.ru/22157386268iyzg3.pdfIn PDF document text
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/6437966.pdfIn PDF document text
    • https://fudaxanoduvilu.weebly.com/uploads/1/3/4/6/134626593/e7185e70c1131.pdfIn PDF document text
    • http://nat-yoga.space/john_deere_gator_parts_manualgfu94.pdfIn PDF document text
    • http://grinallex.shop/9495495127317544.pdfIn PDF document text
    • http://padlamadla.site/beauty_camera_free_for_windows_7fg35e.pdfIn PDF document text
    • http://13millions-warzone.store/6717776106hpbig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_6057e9be84443.pdfIn PDF document text
    • http://inostrana.com/what_is_gods_concept_of_creationjbw8c.pdfIn PDF document text
    • http://scm03.ru/sufodo5mni6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_6036a492539af.pdfIn PDF document text
    • http://clubstore.info/bowmasters_all_upgraded_characters_apkv7vaf.pdfIn PDF document text
    • http://stopnutristrike.ru/minha_talking_angela_apkpure1j0a3.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://demask.space/football_drills_for_8_year_oldsjfxgr.pdfIn PDF document text
    • http://umniashka.ru/world_building_guide_rpgdkm1t.pdfIn PDF document text
    • http://nakanilo.club/popelalatijumixalakuluku2lixk.pdfIn PDF document text
    • http://todayshop.website/84476988193uksfp.pdfIn PDF document text
    • http://lovepositions.info/the_secret_garden_movie_201860hqm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446651/normal_5ff1dc0ce460d.pdfIn PDF document text
    • http://termo-nord.tech/gepitzhw6n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_60194bad30125.pdfIn PDF document text
    • http://sungo1.space/71232155388498wc.pdfIn PDF document text
    • http://idealsit.space/sc_dmv_drivers_license_road_test8mdf8.pdfIn PDF document text
    • http://esclick.pro/best_launcher_for_fire_tv_stick3kmxx.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_off00011c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C99 5324 bytes
SHA-256: f88c2bd3e821e8e2da4facb90cf661f75ba8cb8ed8953edacaa784a52ba27af4
font_01_sfnt_off00012eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAA 11160 bytes
SHA-256: ed51ad4f632030b02fbf162de60f3db107afba4071fa51646967b34260c065bb

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