Malicious PDF — malware analysis report

Static analysis result for SHA-256 821ad81921dd991c…

MALICIOUS

PDF

68.0 KB Created: 2021-02-05 00:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: cb487d60791f7593a5ad6c5e5d16848d SHA-1: 2138829055e82d358be9c9e9c37fcf190cd0fb69 SHA-256: 821ad81921dd991c6c5ec12a1cf9a85b181c281d294a570d9e78e72cbd6b9f1c
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://maypoin.ru/123?utm_term=verizon+scs-2u01+manual PDF link annotation
    • https://cdn.sqhk.co/jotenitix/3hgiahh/poles.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/FjhjchL/9018684446.pdfIn PDF document text
    • https://cdn.sqhk.co/vidujubotaf/wUPS7ge/66681276729.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/7L35hau/i_wish_you_were_gay_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/disonixures/2LoNmoI/sarkar_infinite_game_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/ezRjjJ5/quest_town_saga_game_guardian.pdfIn PDF document text
    • http://xipevufizokev.iblogger.org/cellules_caliciformes_intestin.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/dji9oha/black_friday_buy_online.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/hgjOYgg/digital_terminal_camera.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/fvhaagg/cell_to_singularity_evolution_never_ends_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/kXAZfji/46188818118.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/be5Myhg/moxepajuvun.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/fpO1jcY/48693888998.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buwumipulufi.epizy.com/lesson_master_8-_1_b_answers.pdfIn PDF document text
    • http://vevuxuwomeb.epizy.com/alien_shooter_2_laptop_game.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_off0000cd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD94 5316 bytes
SHA-256: 4470ca1e6fc99250670875d305de64266e0b93ddef98ffb39290a9b396904afa
font_01_sfnt_off0000dfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA7 10572 bytes
SHA-256: a4677304eeecb93e4ba4a16a265af1d1ab872336e18c28e097f8e69c57c716a8