Malicious PDF — malware analysis report

Static analysis result for SHA-256 459a3e7b636872bf…

MALICIOUS

PDF

79.6 KB Created: 2021-03-12 08:01:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f7ac7c255896d18ad69680fe591a951b SHA-1: 17921a63c1388e3d7f5acd190800df5f774ca9b4 SHA-256: 459a3e7b636872bf6ebff66687f693fa7c59c902d95b8b1c14d0bc3bebdf6cf4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://vilenefex.ru/123?utm_term=carrom+board++free PDF link annotation
    • http://trafikcezaodebayisi.com/sujawazokenumikelimafutiaz8.pdfIn PDF document text
    • http://bred-enligne.com/233793336333j7e0.pdfIn PDF document text
    • http://pokypka.xyz/commando_3_game_pcojm2c.pdfIn PDF document text
    • https://cdn.sqhk.co/donewipimep/bhigjej/vabarujuseg.pdfIn PDF document text
    • https://cdn.sqhk.co/mibupufek/je6KCge/38865064320.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/gegivib/sojobozolipurisonunekodaz.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/ghIkDze/risigutaji.pdfIn PDF document text
    • http://terem.space/how_to_apply_at_lowes_onlinev4us6.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/55664017546.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/how_to_make_phthalo_green_oil_paint.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/idjfhgk/vido_lyrical_video_status_maker_apk_mod.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/91795556769.pdfIn PDF document text
    • http://generatorsale.ru/company_safety_plan7x0sn.pdfIn PDF document text
    • http://telemprom.xyz/foundations_of_computer_science_4th_edition_free_download7dt37.pdfIn PDF document text
    • http://b0xberry.online/mcdonalds_breakfast_start_hours_ukv7ntp.pdfIn PDF document text
    • http://verification-help.com/big_ideas_math_algebra_2_student_journal_answer_keyznasw.pdfIn PDF document text
    • http://tk-time.site/john_deere_z425_starting_problems0uf2x.pdfIn PDF document text
    • http://dom-bita.org/kibifemuge3zdul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c3b2a8-8e2e-41de-a38b-24c243d56c3c/logitech_z623_specification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37a7fc4-10ed-4f5a-a764-a3ff6d42f159/logitech_x100_bluetooth_speaker_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2593b324-c94a-41f6-a074-77d4d14788b9/raxodonode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff105499-03ad-40da-a50c-ba24f12c2b05/pumudakuxoguzoketupuvew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef1ef84-6c0a-4677-b3d4-39b8373d0222/qu_es_un_aforismo_y_5_ejemplos.pdfIn PDF document text
    • http://gujimosodaza.myartsonline.com/is_tlauncher_illegal_in_canada.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_off0000fb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB34 4888 bytes
SHA-256: db074054baa90f30742852941ac4ce920795ba3d1b0cd526d12467082fd3341e
font_01_sfnt_off00010bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 11392 bytes
SHA-256: baa5a5d27931caebdf4abd25aabe6c767a41eef88ba56a89d77e718f22837a3b

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