Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb85dd2ecd03d705…

MALICIOUS

PDF

39.9 KB Created: 2020-11-09 11:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b53c7d4109245d4d05f23eceb6d47973 SHA-1: 3160808d2016b6ac3209ee1480ded1b928d821e0 SHA-256: cb85dd2ecd03d705d1be0d0ddaa4dda1b6b0ec587d13d9766504fbefd83b7711
134 Risk Score

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.
  • 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=the+wave+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f8788dae82f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451028/normal_5fa7e77a50808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f9150f604212.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/5d1497883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5f93e9eb79f20.pdfIn PDF document text
    • https://mukozuzaze.weebly.com/uploads/1/3/4/2/134265885/tuzakasazukerewusok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f86fc1ac8798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e206e803-bb03-4235-8721-af22360e12b2/85235470842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20e00d86-9816-42bb-af6f-3b65fd28f4b3/zhuangzi_book_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/zomevenumogi.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/83023732232.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/douwe_egberts_coffee.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/66949053092.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_off000060f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F3 4924 bytes
SHA-256: 8439f7ba85a57d0f3c59ccb331743e2f20b979fb4c103774146711d644c3226e
font_01_sfnt_off000071d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71D4 9736 bytes
SHA-256: 65a5e91d3b9f00bdb3773480d9fc5d08ae82e446f6b704dc9ce1336f6c32b9d4