Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5fff2aa37794ba7…

MALICIOUS

PDF

75.0 KB Created: 2021-03-01 17:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00fedb938e7db22af216c3a7d98b9dc7 SHA-1: 5adead368e022c24ddf4d2b2eecd389315f3d520 SHA-256: c5fff2aa37794ba7768daf3763dcd12023e4aa02a23fee2c4c38448e0dc458e0
66 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware distribution.

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://mezovuduw.ru/wb?keyword=05%20dodge%20ram%201500%20transmission%20problems PDF link annotation
    • http://cleanup-sale.site/brinkmann_pellet_grill_manualp5q8l.pdfIn PDF document text
    • http://mamikuv.iblogger.org/41508762615.pdfIn PDF document text
    • http://onlinetiser.website/woberut2gpfx.pdfIn PDF document text
    • https://zefemebok.weebly.com/uploads/1/3/0/7/130775969/sizakili.pdfIn PDF document text
    • http://jejufanafozotet.22web.org/37113002104.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/61955820460.pdfIn PDF document text
    • https://vilawamilufulob.weebly.com/uploads/1/3/6/0/136006615/soginirilobeb_pixulexujipam_vojal_zorobejowomezun.pdfIn PDF document text
    • http://wamawogep.iblogger.org/api_platform_search_filter_or.pdfIn PDF document text
    • http://priz24.site/siwuxesek53uq9.pdfIn PDF document text
    • https://lugukeku.weebly.com/uploads/1/3/1/4/131407734/gokijapub.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/jilupuzowaroxijusax.pdfIn PDF document text
    • http://legalevi.22web.org/46572464830.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://xuvekixofeku.onlinewebshop.net/42051694907.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/should_school_subjects_be_capitalised.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/49756264721.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_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 5428 bytes
SHA-256: 7636fe5f7ac057a9d3c3f163fcce6fe4c8a1a463a71062bce5374be6dafbaf2b
font_01_sfnt_off0000ea6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6C 11216 bytes
SHA-256: e3767c6c59d17410194e9fb536a0b4cc1dd144db27e1a746a89b860e607c24f2
font_02_sfnt_off000110f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F1 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

Open this report in the interactive analyzer, or submit your own file for analysis.