Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8831f0e56c77940…

MALICIOUS

PDF

37.9 KB Created: 2020-11-05 15:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2a624c21ba331a0cd596ce6ac5f1c727 SHA-1: b1f14d32bdf0a64130b7ece5d53fb1618def567c SHA-256: e8831f0e56c779409876902c2f1ae8fd26af29cdcbf6ade8910fe40aabd3251a
124 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a document body that attempts to trick the user into clicking a link related to Fortnite. The primary malicious URL identified is a redirector, likely leading to further malicious content or a phishing page. No scripts were extracted, but the PDF structure and embedded links indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffine.ru/aws?keyword=fortnite+collect+the+visitor+recording+on In PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/d0e73e.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/2629586.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f9467f73c2ce.pdfIn PDF document text
    • https://mubopizolofovo.weebly.com/uploads/1/3/4/4/134442803/nutinewawegidoxa.pdfIn PDF document text
    • https://gupaxapofigovi.weebly.com/uploads/1/3/4/3/134356466/5075036.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/wuvumodubazovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5f92fa2e7dc5a.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/bubifapakorubera.pdfIn PDF document text
    • https://nijeliwawinezim.weebly.com/uploads/1/3/4/4/134497061/c578786c0298ef.pdfIn PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/9557897.pdfIn PDF document text
    • https://wudemivezetuf.weebly.com/uploads/1/3/4/3/134318680/juzewitutera.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/sakaburepagase/75193325418.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_off00005824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5824 5008 bytes
SHA-256: d2786330364dddfd3ecc7b9b39b0db9be4cae0b6c12f8de711141a522074c980
font_01_sfnt_off0000692f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692F 9876 bytes
SHA-256: f4bf8614bbd901030e8073ed5a48206db053251d2381fad38855d45779945b57

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