Malicious PDF — malware analysis report

Static analysis result for SHA-256 0668dc567286244e…

MALICIOUS

PDF

70.8 KB Created: 2021-01-25 00:18:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a9fcf026afe4746b82c4213973c9aa6a SHA-1: c3cd24df86f8af53a08ed75efe624ff266902145 SHA-256: 0668dc567286244e9850bd08f272e0bbde0b99969e198a3faac1115b3b23c092
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wb?keyword=sport%20car%20soccer%20tournament%203d%20print PDF link annotation
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/joreforuzapubenoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/Miajft4/mtg_eye_of_the_storm_edh.pdfIn PDF document text
    • https://fumabufoduf.weebly.com/uploads/1/3/5/3/135313851/wenep_linajekepalamo_lejiler.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/hTijbhd/oregairu_hachiman_and_yukino.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/8hbTYgf/ligeruvafewusokefoluji.pdfIn PDF document text
    • https://zekufizow.weebly.com/uploads/1/3/0/7/130775694/xofunewazanimokorosa.pdfIn PDF document text
    • https://jokiwaxe.weebly.com/uploads/1/3/2/7/132740814/e3fd083036.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/tesodagiwor/acceptance_letter_format_for_nysc.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/shawn_mendes_songs_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/tea_tv_apk_mod_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/descargar_crash_bandicoot_ps1_para_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/27129036139.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/annabelle_creation_full_movie_cinemavilla_english.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/69739788816.pdfIn PDF document text
    • http://pulawev.epizy.com/clash_of_clans_without_play_store.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_off0000d794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD794 5456 bytes
SHA-256: 3ed8413628c468aa7ec4da685453ea2aa0226abadf9c16a1147ca875d1eef488
font_01_sfnt_off0000ea03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA03 10732 bytes
SHA-256: 3a3c5aeb06c65c5d781897e078deb094484a18946eaf3551440a052ef544a13f

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