Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7342c3ee00c861…

MALICIOUS

PDF

73.2 KB Created: 2021-06-02 18:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5ce9b11e25f79f574348b84b13a8ea2b SHA-1: 6a15e28ba9c6be51fd5e9c86cffd8d33f3a7eb13 SHA-256: ba7342c3ee00c861f465444eef70fee6ee359373e50eb6010d2e24ef6786383e
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one specifically pointing to a link farm designed to redirect users. The document body, though obfuscated, suggests a lure related to philosophical topics, likely to disguise the malicious intent of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://huntic.ru/pbw?utm_term=what+are+the+three+main+areas+of+philosophy PDF link annotation
    • https://gedimonisesejed.weebly.com/uploads/1/3/1/1/131163996/1418009.pdfIn PDF document text
    • https://rigokapine.weebly.com/uploads/1/3/4/5/134593974/7934779.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/nolut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483354/normal_603c5693c94c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_604ab8ba867e0.pdfIn PDF document text
    • https://sigudajofabi.weebly.com/uploads/1/3/4/6/134679089/ruxobajaki_lusemaz_dugenumo_liwim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379969/normal_600074c3bffa4.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/7e857d18-3bd1-45a8-8be5-ef783a27731c/22529373015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc0a78c-8619-4c23-9cdc-56ee6c74e6e7/86791680658.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144412041/kulaguwerirulamaxuxegu.pdfIn PDF document text
    • http://pagorevet.pbworks.com/w/file/fetch/144473190/what_to_feed_baby_blue_tongue_lizards.pdfIn PDF document text
    • http://wusagem.pbworks.com/f/wanokuxojekofixokifinujov.pdfIn PDF document text
    • http://zepupifob.pbworks.com/f/sepuretaxikuwogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ef96ff-ce22-4a4b-9ca3-b5c9fec6c50e/birowi.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/w/file/fetch/144473697/mercutio_and_benvolio_ship_name.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/vinopifojemateladapo.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144501465/bofik.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/w/file/fetch/144472854/61391539994.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/34265375365.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/f/how_much_is_infinix_note_8_in_nigeria_market.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/f/what_is_flight_ticket_number.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/35150296826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b45ab68-9f16-4147-ae70-a2be7c0b09d3/51728055438.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/f/42944238781.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/descargar_winrar_para_windows_7_32_bits_gratis_espaol.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_off0000df7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7D 5256 bytes
SHA-256: 6581b8ba8fa981fdd34eea153af28f0796cad211497e2adffa4aacb87deba754
font_01_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 10800 bytes
SHA-256: b44b772f5d7630403337a2af1621fdae22bfe6273e9503e9d5d8c6200e2914b3