Malicious PDF — malware analysis report

Static analysis result for SHA-256 739d3c51996c9a08…

MALICIOUS

PDF

74.8 KB Created: 2021-02-14 10:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0871e53244ca69c6ea0f656f8e21d36c SHA-1: aa954aeef93b5ec9114b24430185ec1f661bb11f SHA-256: 739d3c51996c9a08bf925be5c38bd6cf5749c276db5a816eb38ec15c10a7fd3e
136 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
  • 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://jacksth.ru/123?utm_term=mazda+rx8+repair+manual+pdf PDF link annotation
    • http://prequester.online/dapesakapenitusaluq76hv.pdfIn PDF document text
    • https://cdn.sqhk.co/surixirulol/QjhYJig/71352090257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_601aad25dbfff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445573/normal_6021cbc75264b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_5fd10660d2cc7.pdfIn PDF document text
    • https://cdn.sqhk.co/jodariwem/hcjhhgf/virus_hunter_2020_is_safe_or_not.pdfIn PDF document text
    • http://ruszaimclub.ru/jimpix_sheet_musicfvofx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401517/normal_5ff27cdb60595.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/fYZya6Z/29935681304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_600432ad8e5ff.pdfIn PDF document text
    • http://afracheat5.xyz/dexinibikezgbkpw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402280/normal_6003424a6c8ce.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/7ZAAhdX/noxezixoledu.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/tawovojo/vumefobozeraburosonomodo.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/nafajaxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/baar_baar_dekho_full_movie_bluray.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/wekajaxilizogobabib.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/xexifikerorewejuson.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_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 5328 bytes
SHA-256: b64471e6a9eff69d37ae22f04a0881b2a52fd13abb4e4c72853f45da00a5cd2d
font_01_sfnt_off0000f627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 11676 bytes
SHA-256: 4931253e867f163c00d2448af098479daebc5e0d58d9e42df54dde7729ae07e7