Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cafa7fe5b0d0554…

MALICIOUS

PDF

71.8 KB Created: 2021-02-22 21:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6d63716d81a63b14bf9f86bc0bacff4b SHA-1: 1a816183f71afa05ea099c015249f8491e9bddda SHA-256: 2cafa7fe5b0d05541a5cc98917fb873d86575621a4fe5ac3346f52f233f9245c
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/wix?keyword=vocabulary+workshop+level+c+unit+9+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421934/normal_602726c77222c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_601c7a7b22e0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481990/normal_5fe1a86a16933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373502/normal_5fce28ece17f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5ffcf4bf20a56.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/creo_parametric_drawing_tutorialcbias.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479460/normal_601b2979ece12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474978/normal_5fd11a41521d1.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/gjdiiY4/highwaymen_movie_netflix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418574/normal_5fdd7c18b6e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420028/normal_601eb6a18c46f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_6019c1ec0ae47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383574/normal_5fe20fd22cb5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447630/normal_5fef361835f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_60315084495c6.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/dopugaxelelema/2468863813.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/kefugudo.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/87068773131.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/sexoxazenowevelaji.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_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 5600 bytes
SHA-256: 6287df81bdc06c0e909df5c27815b4b7f9ef7bcddac877a0fd1ab565fdda8bc4
font_01_sfnt_off0000ee1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1E 10504 bytes
SHA-256: debe96caac4101338fe7a2ca5725d428bf6e09159195dce1bafbe72ecf2e88a4