Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9183ac110da47b…

MALICIOUS

PDF

78.1 KB Created: 2021-03-14 16:37:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9b90f52a2a3cbff8c96982f74338ed SHA-1: 782c5f2e10e3b2d26d7fc1c6939147832a8d7896 SHA-256: cc9183ac110da47bffdc130e15dcabc4715b12ec65e9ab74f899026ee0efdf27
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'midufefew.ru', which is likely used to host malicious content or facilitate phishing. No scripts were extracted, but the PDF structure and external URI strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/award?keyword=caciano+camilo+compostela+pdf
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fdd33db717bd.pdf
    • http://xovekofetovo.66ghz.com/davefilekumekim.pdf
    • http://fiwetud.scienceontheweb.net/wexukowejozegoj.pdf
    • http://vojakebuniseti.22web.org/82885839877.pdf
    • https://cdn.sqhk.co/bibikodazit/h8sDgcm/dezebonutojuvaduso.pdf
    • http://kutakelipaxeb.22web.org/titus_andronicus_quotes.pdf
    • https://cdn-cms.f-static.net/uploads/4425009/normal_602dd91324b5a.pdf
    • https://static.s123-cdn-static.com/uploads/4446038/normal_5ffcb0a180332.pdf
    • https://cdn.sqhk.co/xejokenu/eJgelhh/43549600593.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuzamada/sona_guide_season_9.pdf
    • https://s3.amazonaws.com/tubupejevomo/41980357421.pdf
    • http://muvabeso.epizy.com/what_einstein_told_his_cook_kitchen_science_explained.pdf
    • http://lawurukipajuxe.rf.gd/how_to_replace_liftmaster_keypad.pdf
    • http://rakoduwe.epizy.com/8694406704.pdf
    • http://kavibajegis.onlinewebshop.net/el_nombre_de_la_rosa_castellano.pdf
    • http://vorisenunajix.myartsonline.com/96765923475.pdf
    • https://s3.amazonaws.com/jokotaziweluge/zebra_gk420d_setup_guide.pdf
    • http://rifoxofome.rf.gd/chamma_chamma_song_mp4_pagalworld.pdf
    • https://s3.amazonaws.com/jozaponi/kenmore_50_pint_dehumidifier_manual.pdf
    • http://xipitidugizen.rf.gd/navapowepajipat.pdf
    • http://gaxenomepelir.epizy.com/algebra_tiles_printable.pdf
    • http://mejumobax.atwebpages.com/jujonomig.pdf
    • http://tipunogat.rf.gd/all_of_me_piano_sheet_easy.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb3.bin
80a20f1cff77204ce35d0b6ac1b47af65fbc569cda25911e8f703c1da999956b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB3 1976 bytes
font_01_sfnt_off0000f4d1.bin
b4e301189b3f5525397e1bc58caa7ba8853f0c84f5ee1eca5e6fea9ab2dde18f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D1 5108 bytes
font_02_sfnt_off00010620.bin
057726d9b1ec88cf13b38a52c9dab241e12e15fd674276f6297efe7bd5b8f2e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 10476 bytes

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