Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53aa0d8d7499837…

MALICIOUS

PDF

68.3 KB Created: 2021-02-27 09:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a33435791c68b3d16c99f4dae8d941a9 SHA-1: 72c97019313a45f28165a4e2730b3830a055e4d5 SHA-256: e53aa0d8d7499837742e025f2a9b32159378cd25d455559855b8e09ff5666951
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://maypoin.ru/aws?utm_term=logitech+wave+keyboard+k350+caps+lock+indicator PDF link annotation
    • https://cdn.sqhk.co/pugirunosamo/ie3jgGO/danojenivof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490523/normal_5ff475505a32a.pdfIn PDF document text
    • https://cdn.sqhk.co/foseziwate/jjja8jh/lajagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_6034efe28a623.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493589/normal_602eefbe7df7e.pdfIn PDF document text
    • https://cdn.sqhk.co/lexelinowe/aichbig/minogusupanofexokejopaka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_601f799227641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486982/normal_5ffb4e29b236b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_5fe6c09da3fbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372377/normal_60358aeb46168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5fd10910c3302.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/icFFifN/karulavaxuzurawi.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/oMxGsic/ninja_star_shuriken_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_6036042759d4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwefegilow.rf.gd/criminal_psychology_beginner_s_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5B 6164 bytes
SHA-256: 4ab25f4135cafb5ff36d12960f564da5e6a9684383779a1016f3be5003e20c1b
font_01_sfnt_off0000e06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06C 10344 bytes
SHA-256: ce03061bca7589e90800edf8c0ecc57b19b2e871d3d3f0bc16a342949a670574