Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7a21779f03cd10…

MALICIOUS

PDF

70.6 KB Created: 2021-02-01 04:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: af432a6534e8d1afbcb882f6b782ecfb SHA-1: 40f0536cbe5498f01c095b721e0366c648f3a2f0 SHA-256: fc7a21779f03cd10e99352d38ea274b25ba146dd3693189fa29e4e1a62178f68
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=old+yellow+bricks+lyrics+%25D0%25BF%25D0%25B5%25D1%2580%25D0%25B5%25D0%25B2%25D0%25BE%25D0%25B4 PDF link annotation
    • https://cdn.sqhk.co/lokijuzim/gjf9Lie/skutki_wojna_polsko_bolszewicka_1919-_21.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/NJ2FIjc/indycar_schedule_2020_results.pdfIn PDF document text
    • http://adv-workshop.site/game_maker_language_tutorial7eaaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480402/normal_5ff52b89393ea.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/iczKdAL/69973174266.pdfIn PDF document text
    • https://cdn.sqhk.co/luxanimev/LidJlSQ/nilidusilir.pdfIn PDF document text
    • https://cdn.sqhk.co/zonakagud/ehcnhDR/99690817952.pdfIn PDF document text
    • http://reduslim-sito.site/the_holiness_of_god_rc_sproul_free_downloadz565u.pdfIn PDF document text
    • http://instapodarok.site/11665084917ivnph.pdfIn PDF document text
    • http://umdtheatre.ru/tezufisodv9juo.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/zpghbji/hello_zombie_apk_download_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448551/normal_5fee533920534.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/jjchhvr/88624447607.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/60ghCfy/how_to_play_no_limit_racer.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/iahehhi/94925315907.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEC 5776 bytes
SHA-256: e729bbf680e3588745380e8db43c30789d659de4e8083c87fdf6577d471ab5f8
font_01_sfnt_off0000e12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12D 13452 bytes
SHA-256: a2b77fd7713c6d38f51f770b7f2e0ad09be04f855e33600d1e0c12a07be080f9