Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c42d21765b8af6…

MALICIOUS

PDF

72.3 KB Created: 2021-03-01 19:04:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9671602c088c87f39ede8f4264618324 SHA-1: b5a06b3a42a53b7ec7cb43dc1a858dbc0243190d SHA-256: d3c42d21765b8af65cdb73721f1865b407247e18356b3555719d108690b415c6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/award?keyword=how+to+use+a+metal+lathe+machine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425772/normal_6023d1c317681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459029/normal_602157a78c52e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369907/normal_5fce2962001e4.pdfIn PDF document text
    • https://cdn.sqhk.co/zoburawava/6ziguw0/vofodom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443802/normal_603c25290867a.pdfIn PDF document text
    • https://cdn.sqhk.co/solumapidema/RIpB5Jc/waste_canvas_cross_stitch.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/fufabudekufegus.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/Thcwidh/56559780605.pdfIn PDF document text
    • https://cdn.sqhk.co/momugutatok/hibih80/felutinu.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/tuketojibibulavo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375503/normal_5ff0334207e1b.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/vuker.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 4996 bytes
SHA-256: c04212dddddc07e8939dfea99d54958890874a133c9d1a3c2cd278db1ae9ddfb
font_01_sfnt_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 10320 bytes
SHA-256: 4a38541ece979d70d9b5c4e237905e1e30bca55befc167c8e1745eb6a4f1abde