Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0d30edd9f31477…

MALICIOUS

PDF

88.4 KB Created: 2021-03-27 17:14:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a4bcd2f749d4fb0b1b24300caee90de4 SHA-1: 5457268fe302718e657c63969fa5212a732c2ada SHA-256: fc0d30edd9f3147790831d0097fbc29aa0779d97fa105d8c05f7095dfe032a8b
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 0.9947

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://baarspo.ru/wix?keyword=formax+lean+muscle+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412894/normal_5fce01597e098.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/gchkic3/nitro_powered_rc_cars_near_me.pdfIn PDF document text
    • http://dupaleb.22web.org/what_causes_bony_lumps_on_fingers.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/guwegexetodokunosekajede.pdfIn PDF document text
    • http://jizefuli.22web.org/noco_genius_2_battery_charger_reviews.pdfIn PDF document text
    • http://matrixbicycles.com/bonafide_certificate_application_form_rajasthanjjmaq.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/7ghpaie/strategic_management_books_free.pdfIn PDF document text
    • http://smirno.life/lezutumej8hazo.pdfIn PDF document text
    • http://rcasino.info/160944565713njdw.pdfIn PDF document text
    • http://i-men.ru/latin_writing_for_websites1wi80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_60196d38d2367.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/aVih5s4/formula_1_racer_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jefulajidi/Uagimhj/buranelowesare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_604b33dc4f12f.pdfIn PDF document text
    • http://getporte.xyz/canon_powershot_sx150_is_manual_espaoljj5zd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489969/normal_601cefecb8382.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447085/normal_5fdd65386fbf2.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://zopumukujo.epizy.com/agile_software_development.pdfIn PDF document text
    • http://sanozibexado.epizy.com/job_interview_questions_to_ask_a_supervisor_candidate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72ef600b-b1db-4883-9f44-0e10e31cd898/kingdon_john_agendas_alternatives_and_public_policies.pdfIn PDF document text
    • http://wewiritat.epizy.com/beneath_a_steel_sky_scummvm_android.pdfIn PDF document text
    • http://dijawazuk.rf.gd/besharam_movie_mp4_hd.pdfIn PDF document text
    • http://nulesuli.epizy.com/smart_attendance_system_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304ef32d-cfed-4558-8d8d-ee77803dbfaa/how_do_you_use_a_aroma_rice_cooker.pdfIn PDF document text
    • http://zoxofitelovub.rf.gd/53555948283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ace964d-ba67-4524-b310-1ea960cde943/rugoxeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb6252a7-1085-4eec-bab1-20565a71306a/sopidinoluxufowa.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_off00010e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E89 4920 bytes
SHA-256: 2d6e21c0e44f4bef91afaba1c3267d1675b40ced359ffb00907b0f7d3cb026f6
font_01_sfnt_off00011f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F33 11312 bytes
SHA-256: eb29161a66790b6d3daa77c792b09f06142405932ec9210dbc0dd4b5221e5134
font_02_sfnt_off00014590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14590 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c