Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b160a861547cf10…

MALICIOUS

PDF

47.0 KB Created: 2020-10-17 00:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 416ce0028f44507f9611c07bd2019824 SHA-1: e9fa5881794722621b669e7c2e1f8989c029d6e0 SHA-256: 9b160a861547cf10be52b47df847a54bbfcdbcc2d98c291ab174c02d7bf71b14
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://ggtraff.ru/123?keyword=showbox+android+download+old+version In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f8a0eeaa36db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f8a0d98c6690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f88ce03876bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5f8946807dc42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f87335e43c8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f8920c154458.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f8828dd8d204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8a0e06c1463.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f8a0e2863c80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f8996360f81e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f8756e276642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f89c4213a2eb.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/d8a1c2f8-d06d-498a-bf2f-f3180583607e/nojasekagijokarave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90bc7ce5-47ea-4ce9-b574-6019990e709b/44495506474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25020466-c05a-4337-af9c-50199907098f/25513950660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4e115a-790a-47f4-831f-ba8c5ec17329/kunuporame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e112c47-96d4-4614-bb32-0531d83c2bb4/29834938417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b7bd99-2ea9-4e0a-8a5a-cf4bdba96012/lulupor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec5efe7f-d915-437d-bef7-04fb7ffdeeac/61455434273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f65a4b-c1a6-4f90-b3e2-691fa88409e8/bazopolenukabakemiworu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089b2877-3d72-4ced-af97-a663a0ca5a84/tojotonirefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb60784-15e5-4cfc-934b-995e1a2c75af/59291909192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5850c487-4753-4812-a752-2b7ae170fbfd/69277963977.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_off00007967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7967 5376 bytes
SHA-256: 113d4127ae6fbbc8d5871bebeb50060602cb895fdf937171b1755c50b6a297ad
font_01_sfnt_off00008bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBE 10112 bytes
SHA-256: c0caf239af32b768b870472322025cfdf7b1d57141f0a8e60469f35ee7c86bfd

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