Malicious PDF — malware analysis report

Static analysis result for SHA-256 24816b900b64aa37…

MALICIOUS

PDF

81.6 KB Created: 2020-12-09 20:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d0d1242386c0631a4cc4786f91a08f44 SHA-1: fd575cffee4e617571bea714505c5a94e397b7d6 SHA-256: 24816b900b64aa376d578a4659975915f44c6b93b77907c412d10ff8efb61e41
202 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://traffine.ru/aws?utm_term=introduction+to+machine+learning+nptel+assignment+answers In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/planescape_torment_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/broderbund_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/amelie_song_piano_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc102e7bda9c57a97beca32/t/5fc39afe3570fb44d171f080/1606654720019/xopodes.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/68781007690.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fc83e8090a4f8549d715370/1606958721012/41383721116.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/amoled_live_wallpaper_pro_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cfb8777-94f3-490f-a083-1a4738707962/ge_spacemaker_xl1800_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14581c89e1c4b8fc0e725/t/5fcf527cba7003536ea8bccd/1607422589374/86554259983.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf92c18e72e5fdb9ca11e/1606285622679/wild_garlic_plant_images.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/31200801731.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/jirubunerijaf.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_off0000fee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE4 5516 bytes
SHA-256: f195f0542c11443d844f75ef80ba7b0e99d1ee2038e827e17577b211907f7a76
font_01_sfnt_off00011186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11186 11640 bytes
SHA-256: 1e85644ab297f3823883a0ea1b2849bea2003030ca93b302a6c4bd0d6344ef30

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