Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7b7b15356f6c90…

MALICIOUS

PDF

68.6 KB Created: 2021-01-23 16:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d6d116ae5e7fd98e4a2358b6d2da606a SHA-1: ec407636289e3ff406f18cb2670f7a15ae1784f3 SHA-256: 9d7b7b15356f6c90b525f3120c7dc85822c7a82c84af38f9fe3ca208695ab91a
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=instagram%20story%20video%20maker%20online%20free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5fd3b8f494303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405197/normal_5fd229c236628.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/XlECbjc/kunekukufik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_5fd2c728d2481.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5ff5b8650500b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404953/normal_5ffe2aa8d00cb.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/fkzKq3A/trendy_gacha_life_bad_boy_outfits.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375518/normal_5fe5f61328566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494146/normal_5fc5811ed1e0b.pdfIn PDF document text
    • https://site-1173855.mozfiles.com/files/1173855/zetakigurilovobidawidodor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_5fd66557bd284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fca7820ebe8c.pdfIn PDF document text
    • https://site-1178504.mozfiles.com/files/1178504/sewim.pdfIn PDF document text
    • https://site-1166064.mozfiles.com/files/1166064/rival_stars_horse_racing_desktop_edition_money_cheat.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/bjgiiHE/empire_total_war_politics_guide_united_provinces.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_off0000cf09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF09 5388 bytes
SHA-256: 04f39b38197729ea04336e223e1d82d62680c542399e492f87fd78edbb43cd6d
font_01_sfnt_off0000e160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE160 10552 bytes
SHA-256: c9646e123de55f9df1f6655500c16ab4cbf18496271aeaed096f89279c5bfa22