Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9e63502eaba171…

MALICIOUS

PDF

80.2 KB Created: 2021-02-25 12:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0135eefb7580cd495cba1393644162af SHA-1: d50ba838a26c2c1c5257a311e8949455f50e54ce SHA-256: fd9e63502eaba17145c507f9f26f111dc19df5b6c6abf774ec4679f54107c468
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=how%20to%20do%20tub%20clean%20in%20haier%20washing%20machine PDF link annotation
    • http://kikababono.mywebcommunity.org/katha_upanishad_quotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_602a3dbfa3357.pdfIn PDF document text
    • http://dajexori.mypressonline.com/whirlpool_washing_machine_repair_service_delhi.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/fusebofezesijunori.pdfIn PDF document text
    • https://cdn.sqhk.co/medukukekuke/BusTZgf/battle_warship_naval_empire_gift_codes_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/gghhvje/wuzadakanela.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/20022609918.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/teginazuxoxeleronet.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/dedupipapekot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421612/normal_5ffacbae4492e.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/4593079477.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/djhsidd/star_trek_fleet_command_roe_latinum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/4833340280.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/what_does_this_emoji_mean__from_a_guy.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/what_age_group_is_the_three_little_pigs_for.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/how_long_to_charge_cobra_walkie_talkie.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_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 5544 bytes
SHA-256: 7db1069b4ca2916fb6a03f9d7d82d7e5cca634a04bbdd2c3078ecc954077bbb3
font_01_sfnt_off0000fac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC3 10420 bytes
SHA-256: 463141c5454a633cfac6b1aba88f15f2316fd36a1f56f6ff767b8f919a800810
font_02_sfnt_off00011e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6B 16148 bytes
SHA-256: 333c6b7950143ef5b768b9d621755905cb9f9f437be433e332b6baa8edb2b5fd

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