Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd1fb8b92a119a1…

MALICIOUS

PDF

72.3 KB Created: 2021-03-23 17:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 11fd81aaa4f34aecda2e14ff2fd23b76 SHA-1: 5af2a61ca3699944386752e4a0a6d06bdbcf7411 SHA-256: ccd1fb8b92a119a10656df4b7e46973067357c7892f0ac869794c47681a2bc4b
66 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, and is flagged by an ML classifier as malicious. The document body, though heavily obfuscated, contains text related to a 'Jotun hardtop ax safety data sheet', suggesting a lure. The presence of embedded URLs points towards an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://resalured.ru/123?utm_term=jotun+hardtop+ax+safety+data+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422877/normal_605504d4edad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_600e65e71e525.pdfIn PDF document text
    • http://jaligovaw.iblogger.org/baseball_field_diagram_printable.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/rapavinina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_601d8dc217c75.pdfIn PDF document text
    • http://vugalox.22web.org/jorinikojelufetedeguz.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/59851235273.pdfIn PDF document text
    • http://kijorifoweb.22web.org/zipopifitobate.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/68394615163.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nopadutotufa.epizy.com/logo_design_using_company_name.pdfIn PDF document text
    • https://981168d4-05fc-44b6-871d-73371d7e8cf1.filesusr.com/ugd/87d215_a39f7e5d48484d56bd072d6bfa99f109.pdf?index=trueIn PDF document text
    • http://nawonarubital.epizy.com/tesonadote.pdfIn PDF document text
    • http://gajopule.myartsonline.com/mary_poppins_returns_cast_now.pdfIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_83c5e98bdb2844b781dbe2aabdb6ae43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/persona_4_golden_yosuke_social_link_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/49941485241.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/85263844496.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_8d755ab1b68a47f383ee328b1880e841.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_99253ea0edb349b6b25b244da6b45053.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/geraromu/what_is_an_ecological_tipping_point_in_hindi.pdfIn PDF document text
    • http://gomaxuxibofetap.epizy.com/what_does_the_mandate_of_heaven_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/data_structure_and_algorithm_tutorial.pdfIn PDF document text
    • http://kebinuwozumen.epizy.com/iron_man_cast_reporter.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD182 5088 bytes
SHA-256: 6d0c501d3a040a319ef1e8a532e9c0bf46ac78bbaf3f6615242bda6b4da83c72
font_01_sfnt_off0000e2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D0 9600 bytes
SHA-256: 9fe8414333ff1c34af66a3a3e4513928ecbe0023a00e134a4e6bacd0f5a042f3
font_02_sfnt_off000103c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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