Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afb4c3c3b4c0a3d…

MALICIOUS

PDF

71.5 KB Created: 2021-02-14 03:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 60c7719e3f62def4e35dbcfafb445fb9 SHA-1: 38e05467f555783208f0bda8a2b1ef26915464c7 SHA-256: 4afb4c3c3b4c0a3dbafb1eb583323a919fb00a4ed77f23fde94f06cd9a67b31d
194 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
  • 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://yafferge.ru/123?utm_term=sealfit+wod+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416490/normal_600def3fb26c5.pdfIn PDF document text
    • https://cdn.sqhk.co/nilulugaj/hg3m2dr/warlings_armageddon_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495244/normal_600489f0ca993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5fd72325616bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_601245dd6fa14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446937/normal_5fc6699ed0841.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419654/normal_5ff96dbfe5bd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375093/normal_5ff0177a5c612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450247/normal_5fe936760c61d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5ff3808617fac.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujutenifo/Whdha4H/roxajetixaweniju.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/p1sjchc/71628883374.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/nowonovege/7495053398.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/collect_data_from_multiple_worksheets_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/gikodosedakokebux.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/vomixof.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/lupogowum.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/weather_report_jharkhand_baharagora.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_off0000da75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA75 4956 bytes
SHA-256: b385a361a506895ff9dd4883d93c7f20196f8d1781cf503b8e1dabd625f4176c
font_01_sfnt_off0000eb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 10984 bytes
SHA-256: 48ffbed4e864f9ff55f62697defcfb63be5958dc05ee57c239451efa7f3a09fd

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