Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9287cad07b1701…

MALICIOUS

PDF

44.2 KB Created: 2020-11-07 21:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: e61666c7e01373115d6f84328af32b19 SHA-1: 1ef506926b8ef7509173628c8e6177e95e4428e7 SHA-256: 3f9287cad07b1701b54d6bf47e13b1a122da878f5cffabfa44116ac778929d1f
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/123?keyword=all+the+coins+in+riddle+school+3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5f9fc26301cb1.pdfIn PDF document text
    • https://muzokive.weebly.com/uploads/1/3/4/4/134498707/dikobezuborepek-vireguk-suzatizo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386361/normal_5f8cae40d459c.pdfIn PDF document text
    • https://titawijuneve.weebly.com/uploads/1/3/4/0/134012454/4754c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5fa367779a770.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/b9e9e23.pdfIn PDF document text
    • https://gokisixoxi.weebly.com/uploads/1/3/4/1/134108612/3949549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5f9a590b202bc.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/b04b3e6362e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fojewuxekaku.files.wordpress.com/2020/11/27423302807.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_off00007145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7145 4968 bytes
SHA-256: e99360942cc91a85ed5d19de4a21342badb879517f0caa149c3e6739538f97de
font_01_sfnt_off00008224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8224 9996 bytes
SHA-256: 622d65fbfbfbac273f6a72eab7e95e581ddcf66353bd41583bddce4f38c79c8e