Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc807c93478d92df…

MALICIOUS

PDF

68.8 KB Created: 2021-02-25 04:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 44e55b43991289830e04a9b2e625a323 SHA-1: d4e9d90a31d5c4345235e716efdf8706875c2388 SHA-256: dc807c93478d92df17d0f7128ad19b5f95b46f4d37de51cdde59a0fed528cfb0
136 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
  • 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://baarspo.ru/wix?keyword=reader%2527s+digest+complete+guide+to+sewing+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422658/normal_5ff7d4ab4a844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_60313749c862a.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/y3fhcL8/bapisilibadoteta.pdfIn PDF document text
    • https://cdn.sqhk.co/kokowoxiwi/Cjeojii/26203032906.pdfIn PDF document text
    • http://shop50off.info/55240052327jbsnf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488141/normal_5fe0fd3e445e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465024/normal_6036f1f2b8a77.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/fowugigfmata.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370561/normal_5ffaa81c18b16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fe03ac15e347.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_5fc8541d458ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495037/normal_601ac575e7507.pdfIn PDF document text
    • http://wumalazari.22web.org/chi_health_omaha_jobs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426407/normal_5feec5bf4dd13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372673/normal_5ff1475403e02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxarase.rf.gd/80754960550.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_off0000cfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEB 5608 bytes
SHA-256: a04f53213c998d218c84db5cab74aa8284643e3bc7521cae052a7bfdfa9d91a3
font_01_sfnt_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 10256 bytes
SHA-256: 939dc59bb8e9626513352b7cbb5c07f3f1a14c2c550979fbf0e20b4696598171