Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f76391c9a3e9ffd…

MALICIOUS

PDF

70.1 KB Created: 2021-02-19 10:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1ba036e9d0d54305b0450d588332d5be SHA-1: 5757b234bd1c98aedacf4c4faf1af61fe31fa33c SHA-256: 2f76391c9a3e9ffd0e09df352a344a8cbd395b71dc2d50c11ee8434ae5d279ec
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=cset+subtest+2+study+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372399/normal_6002bce8a8cd9.pdfIn PDF document text
    • https://cdn.sqhk.co/xezafube/cCjjhI4/pizinuvumorupizikuso.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/ic6jfY9/f1_mobile_racing_hints_and_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/duJDhfJ/65540228034.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421940/normal_60072e5d4c939.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/2hgjhif/rowesajo.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/jihfJLA/84475443697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387920/normal_60057f050782d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tubulufegufixo.rf.gd/xupovid.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/fozavanikanotizif.pdfIn PDF document text
    • http://pakafadudu.epizy.com/guacamelee_2_achievement_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA18 4716 bytes
SHA-256: 55f251d5d36aab0ff4f11dbda6b072749f92422238b54d140bd16e55b247fb09
font_01_sfnt_off0000da38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA38 10488 bytes
SHA-256: 53f1277a51dbd53e5ab721ea4086a8b11863ca1a6a0cde63cf14769cbf8b7e43
font_02_sfnt_off0000fde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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