Malicious PDF — malware analysis report

Static analysis result for SHA-256 50836eb88962c94f…

MALICIOUS

PDF

61.6 KB Created: 2020-12-25 00:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 9a4db1cda4d6d97a41fbf7272f979a29 SHA-1: 3ba19f5f0756afbd9b146d7aaea4bbf6e76252a3 SHA-256: 50836eb88962c94f952fac07ca374756221d53cc4539981c3b6ef0ba1cfadb8d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://trafftec.ru/aws?utm_term=gamit+ng+pang-+uri+worksheets+grade+6 PDF link annotation
    • https://cdn.sqhk.co/wuluzajiroz/fiaH6j2/suvalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f8ce1d3040b2.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/VjaomQg/17233365632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f89090c54d17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fcc49741273e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5fa480f18efc4.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/b72fc3ed-5ceb-409b-950b-639210945ab4/deutsch_na_klar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f3414f-13b2-4cbc-978b-68600b1cb648/zipevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebdbb4e7-eacf-475a-9bca-61b79a488831/8977388354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3c6e3a-b06e-4786-a894-d3279f5192fb/voregumibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abb4a77c-4b53-43b6-b7ac-b1c93caeff54/tojadidibafaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136c364d-8a68-4db0-9bac-3d482955fc04/bridge_cruises_with_audrey_grant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdc9ecb4-3eb2-4d1b-bc5d-d33f744a3f84/90910262858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05ceb2ae-011e-4be1-aed6-31ee6b44ccf5/9716897523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ffb9e2-e5b7-407d-8727-46d501efcbc5/who_goes_there_comic.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_off0000b63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB63A 5716 bytes
SHA-256: f8fb15ff2a3196a5bc31b904ec5e893f2a9b88684bcaab338c6e19a5147f80fe
font_01_sfnt_off0000c99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99E 9348 bytes
SHA-256: 1bfd34ddc9658859d6acb1de1b2cc2f7ba62004d780a8af1f2ba5260b6005d25