Malicious PDF — malware analysis report

Static analysis result for SHA-256 8376e629cff03bfb…

MALICIOUS

PDF

67.9 KB Created: 2021-01-22 23:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4f5d9ee74f7a3902ed580790f609ce50 SHA-1: fb5e138b0e4a300f04b088b33d99818f33395759 SHA-256: 8376e629cff03bfb5fd5e24d4edd6d4f99bbfa2f08e682d87dc60e9b2a889a06
144 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wb?keyword=cleaning%20checklist%20template%20excel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5fd8fbc95e0d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391611/normal_5ff81e476f073.pdfIn PDF document text
    • https://cdn.sqhk.co/ribovonubod/ujfgdjc/48293777508.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/lw4jfQD/xofifaxuruxajexumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466657/normal_5fffe1a207b7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389604/normal_5ffbaee3226d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502436/normal_5fffb45d16ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491933/normal_5fe6b1a1a2ea4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5fc9978ff41af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_5fe7ccaf27763.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/ibhahd3/lamosuposozidiko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412575/normal_5fc7d6227d3f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473632/normal_5fe2991c4c7ae.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/xugigabitulu/huntington_beach_surf_report_friday.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/gitinexukusixegosu.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_off0000cc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC56 5288 bytes
SHA-256: e37eb0e498dadf98c53bfed4d13e6a4a76ffcf2764ef9aa1e01cfbce750aed8a
font_01_sfnt_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 10736 bytes
SHA-256: 69b7f43e8a2b29d880c5cc77dd21940e14f6502f755637a9f07e033115d5a6ad