Malicious PDF — malware analysis report

Static analysis result for SHA-256 4396d40884d3af68…

MALICIOUS

PDF

62.0 KB Created: 2020-11-09 22:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: bce644209df083f14aac3ed0e41295aa SHA-1: 7091434f0906d8c59a9d5acb01209aa6284e12ef SHA-256: 4396d40884d3af685fec5d8d895f8524344f1117b36ea9ba3a9f9025488b6447
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/123?keyword=flip+slide+turn+worksheets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390069/normal_5f94fabe00e25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f87639999572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f875e4d29d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f8b67d5e68e0.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/bd57ed3c-8c71-4e2b-b3eb-948233319fce/xiratewafigaru.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/luzefipisewimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8956c558-36d3-45cd-976c-129377cb0c73/zupunujefuvikajifelowovej.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/mubozotomegizibivipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0df95df-71e8-4a6e-bc19-6948c88f4e39/cherished_teddies_value_guide_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/63782967893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671fe713-6a0a-4c6f-80f6-34f986984be6/a_series_of_unfortunate_events_books_1-13_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/73132394095.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_off0000b841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB841 4948 bytes
SHA-256: 0d50cca54e4a12b22d5d04ebd0e760d26ee01923877275e8e7b01a6ebf7de91b
font_01_sfnt_off0000c922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC922 9892 bytes
SHA-256: 9ad246a1b97debbdaacbd06012bbee3082e97e496d19954fdae220277b270b53