Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d9e19f9d66c865…

MALICIOUS

PDF

71.7 KB Created: 2021-02-26 13:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2920e37c72da13fe046e7eaf78ace0a7 SHA-1: b010ae39e328bc463cd710dec5540f8a56520b42 SHA-256: 43d9e19f9d66c865db7a190e788813834fecb764ffa9a7d2b0b6e008dd9f68bc
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=nec+dt300+phone+conference+call PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5fe601296d4a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370530/normal_5febaefe8080c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476453/normal_601e67d82c743.pdfIn PDF document text
    • http://lijamerogavex.iblogger.org/76927448635.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fcdf13c02333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_6015b6a7ed306.pdfIn PDF document text
    • http://hytri.com/microsoft_dynamics_365_manuale_italianovouk3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450719/normal_5fd77bef5e3bb.pdfIn PDF document text
    • http://antonioit.space/osrs_magic_gear_guidewn501.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478148/normal_6003ae0f4d0ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runoxujozu.rf.gd/24758095234.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/dawalogutofis.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_off0000dbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE0 5340 bytes
SHA-256: 4df470e23e427d97fa9d90ac46b3722c7ceaa75caa8e8fbbc94a03f42f6d1e6f
font_01_sfnt_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 10476 bytes
SHA-256: 90e196f7686996f2b7f0044f645c97fb9908ab6060394035aa56db47cd253517