Malicious PDF — malware analysis report

Static analysis result for SHA-256 b242940a128a5d73…

MALICIOUS

PDF

69.9 KB Created: 2021-02-13 15:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 53c27a7ffe28afb59cb607e60b175967 SHA-1: 0cff2252c76f55f8e78cda25a76e4c9ae7bb85c5 SHA-256: b242940a128a5d73b680f41b7ba65279c2de2896d8c4fb64cc4592d3ed82870c
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://jottigo.ru/wb?keyword=chapter%2022%20organic%20chemistry%20answer%20key PDF link annotation
    • http://ihsteam.ru/mestrenova_download_previous_versionlti1m.pdfIn PDF document text
    • https://cdn.sqhk.co/rutisifelom/hh3hiTs/pixel_art_anime_boy_color_by_number.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450883/normal_5fe57d25e365e.pdfIn PDF document text
    • https://cdn.sqhk.co/sozedikepasu/hcQjd2M/dilawawepikuwisusiripudij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_601d8f72489c2.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/4jfVhen/topunirurenuzogimafigivof.pdfIn PDF document text
    • https://cdn.sqhk.co/todiwapubu/ifXDhvG/99517442409.pdfIn PDF document text
    • https://cdn.sqhk.co/kixowijeka/XKYhgt6/lego_batman_dc_super_heroes_apk_playmob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458625/normal_5fdf55137cafa.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/kujesulad/tinevipafakuzidodujepif.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/que_es_contexto_cultural.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/33643909954.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/78170359228.pdfIn PDF document text
    • http://vixezazemezox.epizy.com/21365476226.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/mimukasegejolumunene.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_off0000d179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD179 5608 bytes
SHA-256: 64bc4370956f73fa426d7f308c3c7f35eafbd12f558edd9d4dbd0d7cbf8bc60b
font_01_sfnt_off0000e479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE479 11140 bytes
SHA-256: a3af58549af02ddabcf6ece82417b96a27d94f5d1b5e164ffdaa7a9548bd7d4c