Malicious PDF — malware analysis report

Static analysis result for SHA-256 524ce8e613c28935…

MALICIOUS

PDF

40.0 KB Created: 2020-11-08 07:38:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1bcb6b82f6c06e63f41fb3ddfabbec80 SHA-1: a67397379cd0b081494e8ce249a24cb59f8dfba7 SHA-256: 524ce8e613c28935676c4ad3893fcc44e6b817307cd16139b28d407df1869fed
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/aws?keyword=drivers+manual+new+jersey+2020 In PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/tojobuzatad_pibizofij_sarujizo.pdfIn PDF document text
    • https://nikoxutaju.weebly.com/uploads/1/3/1/3/131378952/7024051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_5fa75c630c367.pdfIn PDF document text
    • https://pumizisumene.weebly.com/uploads/1/3/4/0/134017803/zubudosebabupezuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5f90d899ab388.pdfIn PDF document text
    • https://dizuzoboxok.weebly.com/uploads/1/3/4/3/134351397/65c250.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/basukuvasakutan-berifofufezovet.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/nuwolakuwolala_razopawezaguji_jesova.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/7720254.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/batoragubukepo/message_to_the_blackman_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/revikinawurebowezo.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/58913744852.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/world_4_uuhhh.wav.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/which_of_the_following_is_a_property_of_a_social_software_system_dashboard.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/koromideloviparojesiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/satire_powerpoint_presentation.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_off00005c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6B 5432 bytes
SHA-256: 984fde0ea89f400993e0b01e9019497fb2c3413d93b564b5dc5a24fcf07c0157
font_01_sfnt_off00006eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEC 11060 bytes
SHA-256: b17ccc57a28cf46187a5cf657d86e527413e80045ef75fe3465f67d8e27a5729

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