Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2b4f48b4052a23…

MALICIOUS

PDF

90.4 KB Created: 2021-05-16 05:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c5431ab9fbe74b2d0b43ca48f3686234 SHA-1: 52654d194fbbd72bfa72306f58561e13c98cd139 SHA-256: fc2b4f48b4052a237b3396be6d7215f62892534d3fbd55b1d75a91af5fcdb3e8
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 0.9996

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://baarspo.ru/strik?utm_term=lol+patch+11.2+preview PDF link annotation
    • http://wulixiv.sportsontheweb.net/geronimo_stilton_tv_series_episodes.pdfIn PDF document text
    • http://perevozka.ru/advanced_engineering_mathematics_kreyszig_solutions0xsiw.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/arquitectura_y_sustentabilidad.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/Dhhdehi/soccer_heads_champions_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bapinero/hhnJuhj/22225870924.pdfIn PDF document text
    • http://forkidsshop.online/how_to_make_crown_royal_bag_into_maskfslur.pdfIn PDF document text
    • http://jewogipuwivi.medianewsonline.com/booster_pump.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/62031169079.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/cfa_ethics_curriculum.pdfIn PDF document text
    • http://zaparipajomigi.scienceontheweb.net/fosujijeroz.pdfIn PDF document text
    • https://cdn.sqhk.co/solalokazili/jciiFig/crash_drive_2_mod_apk_3._70.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/nCUjjVB/blood_house_escape_walkthrough_level_7.pdfIn PDF document text
    • http://wbigs.space/whirlpool_washing_machine_parts_price_list_in_indiajuyet.pdfIn PDF document text
    • http://medicinfo.online/2005_honda_odysseyd06aj.pdfIn PDF document text
    • http://lujedovijoluje.22web.org/selling_process.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/hg0XhhW/21711582094.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/foxesikonaseraf.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/wasijemu.pdfIn PDF document text
    • http://dujefukuboxus.epizy.com/paul_feyerabend_against_method.pdfIn PDF document text
    • http://temodorofeg.atwebpages.com/aspects_of_child_development.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/gigabyte_kaby_lake_overclocking_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB0 5152 bytes
SHA-256: f8b70fa9f603217e4f42a74b4d5e169398ae2770577fe55899646bde2c797dc7
font_01_sfnt_off00011f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F51 11840 bytes
SHA-256: bbdc68fb042eee6587f37eea23d9d9940de925dfac98d1ec986a392df1c02e69
font_02_sfnt_off00014597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14597 16096 bytes
SHA-256: 292b67320f20e7e38814323bff47001ccb55b5eebb397aea8a254f3e91f57b87

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