Malicious PDF — malware analysis report

Static analysis result for SHA-256 e986f2924fd51f1d…

MALICIOUS

PDF

73.0 KB Created: 2021-04-04 13:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3e9b70ac72000fd46296d68e749207c1 SHA-1: 16c6c59e29b9d0b47f9790e9d5e354fc23fb46ba SHA-256: e986f2924fd51f1d92c0fb186a5b7f11728e2f422181f9ba2059ec42180745c6
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a lure for a free download of a specific book, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL points to a redirector that likely serves the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/award?keyword=psychological+testing+and+assessment+cohen+9th+edition+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452621/normal_5ffa05349c9b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_5fef19cd6d0df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_60657a2d8f77b.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/gh1jhgc/71341112419.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/hcdgdxP/tap_the_frog_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/ifVmYii/puleziketema.pdfIn PDF document text
    • http://rarokafu.22web.org/the_selection_book_3_free_download.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/what_is_the_most_viewed_rock_song_on_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475016/normal_6021ef1a3c7d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fdc2ec457784.pdfIn PDF document text
    • http://mimivamefigupe.sportsontheweb.net/61639586474.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/wixanarer/file_skin_alucard_mobile_legend.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/42865141160.pdfIn PDF document text
    • http://mawabubobiniz.rf.gd/powerstar_tankless_water_heater_age.pdfIn PDF document text
    • http://zepaxawom.rf.gd/68209281432.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/division_table_1-10_printable.pdfIn PDF document text
    • http://zumaruzafomadik.rf.gd/celerio_car_image.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/47881906192.pdfIn PDF document text
    • http://zexukojol.rf.gd/grief_syndrome_1._10_patch.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/apology_email_template_sample.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 5920 bytes
SHA-256: 2b6d13816b0b20648070df74de0b332d6c64783668fca9fce698218d95ebef39
font_01_sfnt_off0000f02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 11140 bytes
SHA-256: f93e5d42601443c1b91f3899fb7a9919828811c56e6f621cadb07caf211f1f60

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