Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe28c26a3cb7e2e…

MALICIOUS

PDF

77.0 KB Created: 2021-03-26 07:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70b993eb221cf9027736024695ac4a5e SHA-1: bbf4e4705eef8d7502d838974baae00d937224e7 SHA-256: 2fe28c26a3cb7e2e99e57834a2e6d9636aae2da23de1d26861ed235864854f2a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to deliver a malicious payload or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/award?keyword=karyotype+worksheet+pdf
    • https://cdn.sqhk.co/juzureniwibu/eZeicB4/21024167627.pdf
    • https://cdn.sqhk.co/sarunasol/jbidibL/ate_up_all_their_cake_bon_iver_lyrics.pdf
    • http://lifeeuro.info/semekifibitejaxoeex8a.pdf
    • https://cdn.sqhk.co/balemarize/hhajINi/zivurevavirudesokarabi.pdf
    • https://cdn.sqhk.co/tawavumazo/etpsBic/icebreaker_games_with_ping_pong_balls.pdf
    • http://hookup153.online/zilomalixamimiwulenoreamlio.pdf
    • https://cdn.sqhk.co/megopofe/jcjcSha/ramika.pdf
    • http://mamubisuk.mypressonline.com/what_are_some_of_the_positive_effects_of_globalization.pdf
    • https://cdn.sqhk.co/wepunajexiju/oieidVn/sivosize.pdf
    • https://cdn.sqhk.co/winogolelog/xXvFVig/guess_the_disney_song_quiz_printable.pdf
    • https://cdn.sqhk.co/mojikeke/geOOgcs/life_goals_podcast.pdf
    • http://dommasters.site/what_does_the_cowboy_emoji_stand_for2vj41.pdf
    • http://mirijesuwakug.sportsontheweb.net/behringer_xenyx_1202_mixer_black.pdf
    • https://cdn.sqhk.co/kisilusotuke/SgjLpGb/tetanukaze.pdf
    • https://cdn.sqhk.co/ferobisuw/iefCJgt/11173816198.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/turip/xodivukutilukefepux.pdf
    • https://s3.amazonaws.com/radubozufiwo/madame_bovary_cast_2015.pdf
    • http://desovizipelo.onlinewebshop.net/zogegadinufok.pdf
    • https://s3.amazonaws.com/pusolefosex/remington_870_express_magnum_20_gauge_18_inch_barrel.pdf
    • https://s3.amazonaws.com/medaliwifufugel/tutugodajarevub.pdf
    • https://s3.amazonaws.com/bomupi/fosubovobodet.pdf
    • https://s3.amazonaws.com/fipijife/meresasoluzavalazezarufi.pdf
    • https://s3.amazonaws.com/kotodur/stihl_bg56c_carburetor_diagram.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe9.bin
a7f934f36fe7a9a22a5023e9af939e1a7608922609bbd27a3136d921b8e607c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 5324 bytes
font_01_sfnt_off00010215.bin
23886d2fdccb432bcba6365708ecb8397a1a18e2fff37a554618b457a67bf8c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 10680 bytes