Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae8e9ab3dd9e74c…

MALICIOUS

PDF

74.6 KB Created: 2021-03-19 11:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: cd3bdb27230b5e000930de31b4d4b926 SHA-1: 247d8fa1b7b01a290cdf91db617a4220659a7418 SHA-256: 4ae8e9ab3dd9e74cf8fa611e4a3cf22132dcfc4fd0423f9db7ca91016af27821
66 Risk Score

Malware Insights

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

The ML classifier strongly indicates maliciousness, supported by heuristics identifying the PDF as a link farm on disposable hosting. The document contains numerous external URLs, including one pointing to 'dugedepap.ru', suggesting an attempt to redirect the user to potentially malicious sites. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/123?utm_term=dd+news+reporter+name PDF link annotation
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/9233819.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/nolefolasosuxofax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481520/normal_601f7ed522691.pdfIn PDF document text
    • https://buzikapafopix.weebly.com/uploads/1/3/4/3/134375334/xoxuxufulux-zoxil.pdfIn PDF document text
    • http://wopexobow.mywebcommunity.org/xuzolamoluvon.pdfIn PDF document text
    • http://kuboduzuke.mypressonline.com/letter_to_my_nephew_on_his_second_birthday.pdfIn PDF document text
    • https://masevaru.weebly.com/uploads/1/3/5/3/135346062/4366961.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fcebbd939e13.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/gilipiper.pdfIn PDF document text
    • https://putoluvutawubu.weebly.com/uploads/1/3/1/4/131437806/c48ae0e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495684/normal_60290648b941a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/60487849072.pdfIn PDF document text
    • http://pizenusogusu.atwebpages.com/12684805328.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/is_there_vrchat_on_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/81370559145.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/13763687467.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/bts_love_yourself_answer_photoshoot.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/98264752325.pdfIn PDF document text
    • http://fuluxewamotate.atwebpages.com/kegoburexexutuxabexepar.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_off0000e727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE727 5164 bytes
SHA-256: fe66b930a2ff02e0939fedf456ceec98d129e1c3884495912fd69a62da38a915
font_01_sfnt_off0000f8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 10836 bytes
SHA-256: f2b26b3a2bb835e65b0b50ab5ec9f3634a5876d0849035826a440143dd7bdbff

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