Malicious PDF — malware analysis report

Static analysis result for SHA-256 613aa3c340216b4d…

MALICIOUS

PDF

67.7 KB Created: 2021-02-18 06:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9df76bf2df25a9e7b0ce9f0a706b35d1 SHA-1: ac13b7117d51795cdfd09fe4c86b9d48e7db6140 SHA-256: 613aa3c340216b4d95b309d52444b7af4de634e8eec51eff0338e3ec320dddff
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=linkin+park+castle+of+glass+mp3+muzmo In PDF document text
    • https://cdn.sqhk.co/wefegiwezon/hcihrOI/sight_word_coloring_pages_christmas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403959/normal_600689ef3928c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456705/normal_6004dc8e7bfa3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419204/normal_600379a31e5ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_600ad6d24f7ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5fcd125b8c0b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471106/normal_5fe91fae97685.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5fe55943ebc4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446774/normal_6008c644efd7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_5ff3e5c532fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_601c62a4d0b7f.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/L3jchfp/editable_homeschool_planner_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375071/normal_5fe283d2ea822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_6011edd990b03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447086/normal_602465d042867.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5ff16d56de8c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444351/normal_6008f6aae2352.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/nuselufuzo/25738768116.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_off0000c93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93A 5556 bytes
SHA-256: dbeb436940dadf31841b886da364d5f5a1627e48ad2520d76d214003b05fa1cb
font_01_sfnt_off0000dc1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1B 11028 bytes
SHA-256: 4536bbae64f08a48d392f9b5aea7066e85b605cda22cf1a4919bd8ec87e6f65b