Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5efbfdb4c13363…

MALICIOUS

PDF

72.3 KB Created: 2021-02-17 03:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 77b391778f6daa077f655921e5c956b1 SHA-1: a87417a25186a76ae7d22f930925c033b68eb519 SHA-256: 5b5efbfdb4c13363a5aa0cf77d9509216ce7c5a902cc63d8cdba4b8457ef0430
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=irrational+numbers+worksheet+kuta PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412902/normal_6027768f3b02a.pdfIn PDF document text
    • http://1ux.site/coat_of_arms_study_crossword_answer4ol4k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_601ff276d9069.pdfIn PDF document text
    • http://chambrehq.xyz/game_art_style_guide_exampleih55r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5fcd336a7f7ed.pdfIn PDF document text
    • http://berkeciftci.net/36218128852t6ysm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lelekon.epizy.com/35872642368.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/simple_future_and_future_progressive_worksheets.pdfIn PDF document text
    • http://memaded.epizy.com/nokujuwolutudemonata.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/tweakbox_app_doesn_t.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/cv_templates_free_word_document_bd.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/xegibo.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/afrikaans_love_songs.pdfIn PDF document text
    • http://nonozud.rf.gd/60839890790.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_off0000e0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DE 5156 bytes
SHA-256: 59438a39353a9f994b9dbd83c9365c5c7806dfa2ac94a3ff9cb9182e562a3fef
font_01_sfnt_off0000f248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF248 9988 bytes
SHA-256: 6e39c0646ffc872c9f7fe074e688c851d26a5378e4eeb692f60f9c4e1dc5b561