Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa4f78ed1682c12…

MALICIOUS

PDF

68.2 KB Created: 2021-02-19 11:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b879caf609604d150c558ad5747e46ee SHA-1: 59df6120b73ee002499c0b6329f03f88cf9648f5 SHA-256: 4fa4f78ed1682c124d2989767e777559589cd50a652579058503342ba83d6088
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=sas+survival+guide+2e+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5ff64f8a7f873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_60291adc4e2ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_6029731513168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387589/normal_6006bc05f3274.pdfIn PDF document text
    • https://cdn.sqhk.co/gujamozulas/hCighcj/west_gunfighter_part_2.pdfIn PDF document text
    • https://cdn.sqhk.co/segenoliz/hiKdehd/billie_eilish_hd_wallpaper_for_mobile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403936/normal_5fe214c1a52da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424376/normal_5ff50ee98b0d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_602a3df9f0b1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_601d39701692d.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/icYicVs/donkey_kong_64_donkey_kong_voice.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5fd8d281c8c46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fec06012bb7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_602d4723df03c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387939/normal_5ff158c74cb75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_60240d3da2f2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446638/normal_5ff8fc49e40fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_601732f60c38d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414696/normal_5ffd64f20fbfd.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_off0000cca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA4 5504 bytes
SHA-256: ad14cbce79be5a569a73b8bb5631c59400966120c611a54333edb95e6ba7eb60
font_01_sfnt_off0000df71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF71 10236 bytes
SHA-256: 9a80b48323ef4f5aa06b9cabe329adee5d117b455614cac689e1b85443d12bc6

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