Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b1212231c78a37…

MALICIOUS

PDF

75.3 KB Created: 2021-05-03 20:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5f4939c7682ea2bcb8da5204af02221f SHA-1: 157a65dc5b7faf0c3809c7919d28be7b7fca4713 SHA-256: 64b1212231c78a372ae5ed620cbf2dd5de1ec48a0b409f4950337a28dd899479
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://fokemale.ru/strik?utm_term=behave+the+biology+of+humans+at+our+best+and+worst+book+review PDF link annotation
    • http://zuxekagapefe.mygamesonline.org/uppababy_mesa_weight_range.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/srimad_bhagavad_gita_in_bengali_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobigawe/iijgEgc/53894916981.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/t8hiSIL/recette_sandwich_mou_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_6021bf2fb7384.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/vufap-pekedatere-senajutepavo.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/ihgctTg/love_story_book_in_gujarati.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/limenim-tepasasupujoma-sopapa-zaxolibojab.pdfIn PDF document text
    • https://cdn.sqhk.co/dobopejig/b3Nifih/wars_mobile_world_war_2.pdfIn PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/didejipugesaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_60359de42858e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5fd27cd811af6.pdfIn PDF document text
    • https://luvokivimowef.weebly.com/uploads/1/3/1/6/131607407/729d683f.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/gL9EZCr/73759802098.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/vpicgjE/video_editor_glitch_video_effect_movie_maker_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fubemabofof/6QieThi/gutoteziloripimuvurik.pdfIn PDF document text
    • https://jezasozogederek.weebly.com/uploads/1/3/5/9/135960593/2595000.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/64e182b8-1092-4619-9a7d-bdd651fc0cfe/29950236836.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374824fa-6b30-4b10-b0e5-129f731cc974/50158058388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cdb1b7a-5320-4f3a-964f-62dd53fe7acb/dorian_gray_movie_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a930f50e-adca-4d04-8268-e88e353922ca/minn_kota_riptide_70_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71621b91-8d25-40e3-9145-0368ffc2f7fa/kibipomi.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_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 5828 bytes
SHA-256: bc3704fdd865c863095eea8fb0a9f1b718be49a6fcfee616b955a164f9153089
font_01_sfnt_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 10404 bytes
SHA-256: 9a1da91f168bf0db8f18d474ed64b53a6206198a1641427fa0e7f3aeb4ca8564