Malicious PDF — malware analysis report

Static analysis result for SHA-256 c456708b5687ad4e…

MALICIOUS

PDF

79.9 KB Created: 2021-03-12 11:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 437d6b043d2b972a9db274d70d1bc8ef SHA-1: e3f6cace38b1cfa3b4acdb122038ca167fbf1d2f SHA-256: c456708b5687ad4e10f6be73689020cc77c63046a9455f6ab3c96d10dd8f5ecc
96 Risk Score

Malware Insights

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

The file is a PDF containing an external URI that leads to a lure related to 'English phrases for dummies'. ML classifiers and ClamAV strongly indicate maliciousness, classifying it as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/award?keyword=english+phrases+for+dummies+pdf
    • http://reduslimitaly-official.site/joxobonulevubatubimeniruv1xjkd.pdf
    • http://xipuloval.iblogger.org/busy_busy_song_mp4_pagalworld.pdf
    • http://beguwidip.scienceontheweb.net/90062697097.pdf
    • http://pebunoguge.mygamesonline.org/harry_potter_half_blood_prince_blurb.pdf
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/8ca87af7a3.pdf
    • https://meronikam.weebly.com/uploads/1/3/4/7/134705372/1362629.pdf
    • https://mujunoba.weebly.com/uploads/1/3/2/6/132682006/wikigakosifimos.pdf
    • http://zdorovie-vashe-vse.xyz/heptinstalls_pathology_of_the_kidney_7th_edition_free_download5o8yk.pdf
    • http://mon-compte-cmb.best/kamolib6jco1.pdf
    • http://xepuxesadara.mypressonline.com/arrl_handbook_2021.pdf
    • http://dle-tpl.site/giwubajamolafixodibi52lp5.pdf
    • http://legendnat.space/22202429388a09yc.pdf
    • http://furniture21.online/16798858634qvnrn.pdf
    • http://sepoxudozixo.sportsontheweb.net/44089321970.pdf
    • http://redofokotab.sportsontheweb.net/43004769105.pdf
    • http://help-feedback-amzn8.xyz/38779292643u5tcp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://danidarexixuw.epizy.com/53520050784.pdf
    • http://biwagevaku.epizy.com/airport_codes_worldwide.pdf
    • http://fojinejadasetax.epizy.com/collibra_connect_data_sheet.pdf
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_6404cf52d2f34d7099107f8e2bec5298.pdf?index=true
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_21fa5dc28bda41bf92da075df7907992.pdf?index=true
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_6073a53242bc4c18be573f351ae0f629.pdf?index=true
    • 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_off0000ee3b.bin
924818e253c07b72716360a4edbe16b9e1df180748bd0d17f1985f8c4299f012		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3B 5216 bytes
font_01_sfnt_off0000ffc0.bin
dc779910a3a79881b8ae00f10c063358117092a481a35fc37c3aa968ab166a30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC0 10788 bytes
font_02_sfnt_off0001241b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1241B 4324 bytes

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