Malicious PDF — malware analysis report

Static analysis result for SHA-256 25216abbeb8e16b4…

MALICIOUS

PDF

77.4 KB Created: 2021-02-02 04:02:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 241cd6db6838028230698bc3a086a0ac SHA-1: 607eb6e7fc51ccd66e83b9afbf6116b2be2766c2 SHA-256: 25216abbeb8e16b4358289be2687f4fb6899e7713c0a278c77ab2a4312bad017
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/123?utm_term=der+besuch+der+alten+dame+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426088/normal_600d6aa015b31.pdfIn PDF document text
    • http://plsale.pro/gangsta_granny_chapter_1d7uqj.pdfIn PDF document text
    • https://madumowa.weebly.com/uploads/1/3/2/7/132710776/55224.pdfIn PDF document text
    • http://newberginvestmentproperty.com/simplenote_markdown_previewbc6qk.pdfIn PDF document text
    • http://best-ital.fun/wabojepe7ea.pdfIn PDF document text
    • https://nezivubu.weebly.com/uploads/1/3/1/3/131384481/a25ebed2c9c5.pdfIn PDF document text
    • https://pitefomut.weebly.com/uploads/1/3/2/6/132682610/janonujaro-zifitelaw-sikivokum.pdfIn PDF document text
    • http://tolujupa.22web.org/95894220793.pdfIn PDF document text
    • https://xomuwesakutizid.weebly.com/uploads/1/3/5/3/135393414/8b66f827.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sumorililuduj.epizy.com/65503475909.pdfIn PDF document text
    • http://xewegifugeralot.rf.gd/chhukar_mere_man_ko_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/66956637148.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/pair_birds_photos_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/adulsa_plant_information_and_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/demovilutudopere.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/swiftkey_pro_apk_cracked.pdfIn PDF document text
    • http://jiresigotapikeb.rf.gd/extent_report_example.pdfIn PDF document text
    • http://jowunimigafej.rf.gd/irctc_train_seat_reservation_information.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_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 5420 bytes
SHA-256: e754ce47be4e3491efdffde0182684f80549306a4002652f930dca8498712d16
font_01_sfnt_off00010124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10124 11556 bytes
SHA-256: f78afac1988351e92546c8a6d5250c0bc956c5d7c641488a82497947b48d9bd2

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