Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fd3d0a1626f51c…

MALICIOUS

PDF

70.9 KB Created: 2021-02-17 11:21:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 826a1b83aaa59a7eb0a0029b762e83a1 SHA-1: 2fb36268134694409b1223c31dc38dbe6b9a490f SHA-256: e7fd3d0a1626f51c54899df7074313d1f64075f58149267f88bcc2cb2039a3c0
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/aws?utm_term=how+to+win+pa+lottery+scratch+off In PDF document text
    • https://static.s123-cdn-static.com/uploads/4485016/normal_5fe0af7f716d4.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/jdiiwih/praadis_education_learning_app_for_students.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/hfgdjba/umc_connectional_fcu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_6018a4023d70e.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/Giahiib/39459523141.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/wJchcEt/retro_game_box_with_400_games_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/doxanusubomo/cjhUXjb/rusajiwodabilumoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_6012177b5db26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384835/normal_6023e8c943713.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/FV3gehb/zofejojufak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5fd165a961ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455207/normal_602c951e26a3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_6027bd0b2abc0.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/dCejdwI/bexogezakukewumisepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411220/normal_602c729928cf4.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_off0000d83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83C 5260 bytes
SHA-256: 16d153c7360cf545f5e46b84e6a0ec57c1ae2699357d045dbe311845d1fe40d3
font_01_sfnt_off0000ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA30 10692 bytes
SHA-256: f5e7df0af64c082b7e537a69b06ce18481bdfd0b89d937c788bac72aec21beec