Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf07e98073662a2…

MALICIOUS

PDF

82.1 KB Created: 2021-03-12 18:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0f961ea6049b02c3eb57e435ddbff2b4 SHA-1: 2a910be0a024587a4773667b94c4213b5751f293 SHA-256: adf07e98073662a207850d5cfbc8289e440b81e1d245b65e49270ffd5825504c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/wix?keyword=anam+cara+english+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495034/normal_603c46121542a.pdfIn PDF document text
    • http://gijofabenetawix.66ghz.com/idioms_worksheets_for_grade_5_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469849/normal_601dd7c38e678.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366327/normal_5fdef9182a18b.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/read_the_adventures_of_sherlock_holmes.pdfIn PDF document text
    • http://mydenverneighborhoods.com/el_poder_de_la_vision_dante_gebelhd92m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447467/normal_600c2002da406.pdfIn PDF document text
    • http://psychologyrelax.xyz/99679720742r26su.pdfIn PDF document text
    • http://vovality.club/how_to_use_amazon_echo_as_an_intercompunyw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453900/normal_5ffa8c2cc1c75.pdfIn PDF document text
    • http://wisopenudaris.22web.org/forgotten_realms_3.5_books.pdfIn PDF document text
    • http://resugigujo.iblogger.org/misuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424341/normal_604028445c28c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424991/normal_601bfa8f35064.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/68160764907.pdfIn PDF document text
    • http://vk-settings-change.online/2833491197vbzp4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_60069ca7aada0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gizogebinide.rf.gd/climate_definition_geography.pdfIn PDF document text
    • http://jamenafa.epizy.com/91750528026.pdfIn PDF document text
    • http://fejonaxi.myartsonline.com/rowobugogetolana.pdfIn PDF document text
    • http://xirozaza.onlinewebshop.net/jamila_aitmatov.pdfIn PDF document text
    • http://kimatun.epizy.com/abordagens_de_auditoria_de_sistemas_de_informao.pdfIn PDF document text
    • http://gitodake.myartsonline.com/watch_pride_and_prejudice_and_zombies_online_free_dailymotion.pdfIn PDF document text
    • http://zapivevo.epizy.com/ketixefaweg.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_off000104b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B5 5556 bytes
SHA-256: 412312aba223bb593a9b34b062e7d6c7b6020d35d513ffacab5ec160ce4f21bc
font_01_sfnt_off0001176e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176E 10644 bytes
SHA-256: 1002ffc058defee613592cfcde871901426ed0e30f8955c97c66c5ff7b737257