Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1d5cb8a6db5722…

MALICIOUS

PDF

70.7 KB Created: 2021-01-28 01:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9b88e582880788d3a162a6bf23407f85 SHA-1: ab36dca7ffd576eadb2359b52a716d052f75813b SHA-256: bf1d5cb8a6db5722e629eb94f4ef675b4a050c9809c7ae2b8c21d7a7387c7d94
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://seumenha.ru/wb?keyword=sword%20art%20online%20anime%20news%20network PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4478125/normal_5fed1043058b2.pdfIn PDF document text
    • https://sanofawuvi.weebly.com/uploads/1/3/4/5/134588151/e5b5c21d.pdfIn PDF document text
    • https://dalupapixoriwu.weebly.com/uploads/1/3/1/4/131438121/vutafeminifusa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420037/normal_5ff7d6a18245b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380867/normal_5fe024c6933b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464068/normal_5fe0b98d88b43.pdfIn PDF document text
    • https://kulitexujaw.weebly.com/uploads/1/3/4/0/134099612/1c45a2633249810.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419828/normal_5feb60e48f0b0.pdfIn PDF document text
    • https://waxagenejefud.weebly.com/uploads/1/3/4/7/134712445/dd1f2c19f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382952/normal_5fec61ba6f661.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/bgKGOhg/68482122045.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/dixaleko/80203260590.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/imagenomic_plugin_console_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/61951130920.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/latest_bollywood_movies_free_hd.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_off0000d76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76A 5232 bytes
SHA-256: ea9f6c441294b92e033fe9084393acef089df52694a7ffeb868d33927cbe3fdc
font_01_sfnt_off0000e92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92F 10944 bytes
SHA-256: 7522a4cf8ad0b8b8c788a508c9d92b40a6527a22dc5e85487e15cbd4f012a526