Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7be0fe6b333f741…

MALICIOUS

PDF

82.8 KB Created: 2021-03-15 22:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 63f8591d87a4a0eb55693e4ccbe00cbc SHA-1: d9e8a46253025298c6f61e4aa6b697aedd9fd7e7 SHA-256: f7be0fe6b333f7417c16e39e744fc3759c090a12e8bd4770b519cb5db2172a2b
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, with high-severity heuristics indicating it's a phishing lure. The embedded URL, 'https://mezovuduw.ru/wix?keyword=understanding+cancer+worksheet+answers', is likely used to redirect users to a malicious site. No scripts were extracted, but the overall pattern suggests a phishing attempt or malware distribution.

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://mezovuduw.ru/wix?keyword=understanding+cancer+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/pafevola/dvkx6jc/picsart_video_maker_movie_editor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470542/normal_6015e7fc011ee.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/QgfPagj/25182197373.pdfIn PDF document text
    • https://cdn.sqhk.co/xurilopotun/jhjeijG/conway_s_game_of_life_online_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/hhbji4l/kuzobagiradinuxuvivubo.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/jeicbDd/sunday_school_lessons_for_kids.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/XGhfFmW/45500660010.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/gUgf1s2/find_the_ball_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475565/normal_5fe380e2d4e65.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/Fjaqgfj/bounce_back_loan_barclays_processing_time.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwosowo/haijigg/rush_limbaugh_podcast_youtube_october_21_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/libewepigux/igaX5Ip/wikipedia_logo_history.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_60111b8bd4407.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b33a607b-d620-4dd9-8437-41ff48295e6d/68647480090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68530cb8-8864-42c0-8a6d-a37bfbc1af57/dareruxosogip.pdfIn PDF document text
    • http://xebenuxod.rf.gd/mortal_instruments_tv_show_review.pdfIn PDF document text
    • http://wupejuxudeg.rf.gd/bootstrap_download_icon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/386632f7-3326-4836-9ff0-0363856744b7/letotidebixamidafiriluvon.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_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 5316 bytes
SHA-256: 6fa0b37aed91b97a5450447063873dd60378fe53f2705a799762fdebc69afa26
font_01_sfnt_off00011a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0D 10648 bytes
SHA-256: ab8b1753d5eeb096b3c8db9441136b1063e2466fbeb38178ab07efed3068d077

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