Malicious PDF — malware analysis report

Static analysis result for SHA-256 38acbe523faf7fc3…

MALICIOUS

PDF

68.6 KB Created: 2020-11-17 14:11:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ea69d7c423b958ce5c88419672157ad5 SHA-1: 006ebb7614af5029277ed39b0462b837927b2dee SHA-256: 38acbe523faf7fc3a133d89b2b0f83113944e375b46726983563087cd6b5df7f
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/wb?keyword=dreamville%20under%20the%20sun%20instrumental In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476288/normal_5fa6f6661c5bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_5f94213f6fc96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f8fa8262bca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_5f91538c8e1df.pdfIn PDF document text
    • https://sifumoxijobobo.weebly.com/uploads/1/3/4/4/134493963/tirosipawewuwufij.pdfIn PDF document text
    • https://dudasajaje.weebly.com/uploads/1/3/4/3/134362454/e645fe515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f8718c3bf62b.pdfIn PDF document text
    • https://diminulagiv.weebly.com/uploads/1/3/4/4/134489960/kapinarabolupegi.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/a9949bf5-680c-4786-a8fa-bb1d4c453ebd/tko_je_tko_u_ndh.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/4_108_perkins_diesel_engine_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/pavog.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/que_son_los_cantares_de_gesta.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/xewunazozesuvuxezatow.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_off0000cb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8F 5124 bytes
SHA-256: 4106b71a19019ac7e97aeea241d300ea9f980182c46c32ef7bf60ce153c92e2b
font_01_sfnt_off0000dcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD5 12404 bytes
SHA-256: 3057e36326185032d0f811abfbcb2af7ff7a8992e729c996439ba5b642b9405c

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