Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4033eded4c6e7c8…

MALICIOUS

PDF

45.5 KB Created: 2020-11-09 15:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 82240192e4d269f59bb0ac2d84968c0a SHA-1: eae580d15421237e391aed93254e6805c88e5abf SHA-256: d4033eded4c6e7c87b3fde97b59ccdc76e0810d0c8bdaf1dad7485045278d27a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://trafffi.ru/aws?keyword=pokemon+rejuvenation+pokemon+location+guide PDF link annotation
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/xijukil.pdfIn PDF document text
    • https://rojisubul.weebly.com/uploads/1/3/4/5/134593633/c0bda99653cb.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/4739741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_5fa10f1086452.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/mozarivuwel.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/gojodep.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/muvarelo/vandana_shiva_ecofeminism.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/29328159744.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/soccer_drills_for_u9.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/13157941856.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/82929651809.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_off000070ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CA 5416 bytes
SHA-256: e4a015fdfb68b502f20af2a385c8d455e79c0345e3a4e6b74e322bc860b90acc
font_01_sfnt_off0000832f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832F 11280 bytes
SHA-256: 6bfb7c185a4990ebb880721cbdf6b199d419fe06bc3af9308ce44b868e42aff1