Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71c573ffb9e25e4…

MALICIOUS

PDF

65.3 KB Created: 2021-02-26 01:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e78be76a53d4ed0e3c6fe6bb893bc9a7 SHA-1: ea8f3dbcc7451513041fa24c01b617b640ca98be SHA-256: a71c573ffb9e25e483287bc3f01e77234de04035bf085c0432c6cf1a3b2b1901
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://leonvi.ru/award?keyword=best+introduction+to+calculus+of+variations PDF link annotation
    • https://cdn.sqhk.co/gebunemif/d61ib3Y/basketball_swipe_star_basketball_shoot_games.pdfIn PDF document text
    • http://wbigs.space/padizegivuzumevb4bll.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_60359bb26505b.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwasusul/iphaQzt/real_driving_sim_hack_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/hfeyjdW/nixerozatowusejiduzufop.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/MjcQgda/82276493081.pdfIn PDF document text
    • http://stav-games.ru/wuvobigamajigasolepesafit3y128.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxobenona/bYHhaNh/68175649118.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/fYcRfij/stick_ranger_gunner_build.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467030/normal_5fe031ff12af6.pdfIn PDF document text
    • http://lbaranaydin.com/81663543796b82no.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/remufuzu/beijing_platform_for_action.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/tedozawewuvilopipinewos.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/best_football_games_for_android_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/grand_bahia_principe_punta_cana_map.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_off0000c55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55E 5124 bytes
SHA-256: 6b425eae69e938139a25153f3b49dcd0b2578064fc9f2b786a343be277c155b9
font_01_sfnt_off0000d6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E0 9732 bytes
SHA-256: f65cff2d626bef9f68d03805592417c4b23ce3d2f46fb597880c28b33a192372