Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c7885a40370422…

MALICIOUS

PDF

69.7 KB Created: 2021-02-02 01:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 625deda92b4a819c68fce81c2102e3ec SHA-1: d6d3e6cca318581c60939644c854ed61f89d0202 SHA-256: c0c7885a403704220963087634f41b0747d02eeb83d4a219db7d331edb70b7de
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=calculus+1+worksheet+8 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451376/normal_5ffb8b2b0c54f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419857/normal_60144eeab4d51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457857/normal_5ff4a36018bdc.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/dijuuhb/70374864290.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420764/normal_5fe38c5b43844.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455639/normal_6005bd09c09f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5fd2ff60801dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473064/normal_5feee53138843.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/J9iejhN/27113289100.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/kosipefojaw/sugetixekinivunodap.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/bosedotujubewi.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/75613712507.pdfIn PDF document text
    • http://patabajisof.epizy.com/inferring_worksheets_grade_7.pdfIn PDF document text
    • http://jotikovan.rf.gd/36173649526.pdfIn PDF document text
    • http://jezawirigi.epizy.com/cfe._urssaf._fr_dclarer_une_formalit.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_off0000d4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D4 5192 bytes
SHA-256: b35611a9db672ed4d37ba936589d31e138701db0eae05d14a7af076603ba7251
font_01_sfnt_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 10328 bytes
SHA-256: 72a7dd2f18c4fe4d6e5cb548553b11d5c00fb9a00eb319b61f2365e5b917398b