Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc916168e9ec7ef…

MALICIOUS

PDF

71.3 KB Created: 2021-03-22 03:24:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1278cfdc0dfb51d848fe1d5afc556ab SHA-1: 220acbf66c567553ca4c7bc42391d6e38da9952f SHA-256: afc916168e9ec7efe2b6cbf8a8c23dbd68e6a2d34cf2e82e502731117e9174f7
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'xezojetit.ru', which is likely used to host a malicious payload or redirect to a phishing page. The document body, though heavily obfuscated, suggests a lure related to academic formatting, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/123?utm_term=bibliography+extended+essay+format
    • http://kuzososo.mygamesonline.org/45405512647.pdf
    • http://profaudit32.ru/how_much_does_drivers_license_renewal_cost_in_mississippieeuwy.pdf
    • http://new-leggins.site/introduction_to_java_programming_includes_data_structures_eleventh_editionkbyo8.pdf
    • http://lumobumekola.getenjoyment.net/69665386694.pdf
    • http://obzorov.site/cartoon_video_song_punjabigk9wk.pdf
    • http://mavaxur.mywebcommunity.org/frigidaire_stackable_washer_and_dryer_not_heating.pdf
    • http://xoxapepagaxon.mypressonline.com/surrealism_in_english_literature.pdf
    • http://gexopidikimo.mygamesonline.org/kekerenasiwupamanogikal.pdf
    • http://gagimubu.mywebcommunity.org/75507920678.pdf
    • http://uplrezina.site/old_school_house_music_songs_download934av.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rurovikejigibu/pegewinaxefiwepezitazakil.pdf
    • http://nofolimuri.myartsonline.com/kewokubaxupik.pdf
    • http://mesesoriran.epizy.com/kepef.pdf
    • http://nufuwulevek.epizy.com/big_green_egg_grid_lifter.pdf
    • https://s3.amazonaws.com/tezude/xusopoximukulog.pdf
    • https://s3.amazonaws.com/leteraxewe/96033579781.pdf
    • http://mebebuxepok.rf.gd/water_borne_diseases_and_their_prevention.pdf
    • https://uploads.strikinglycdn.com/files/d20b6c74-ca50-498b-9110-455c778e8767/estudio_del_trabajo_1_unidad_4_estudio_de_tiempos_con_cronometro.pdf
    • https://uploads.strikinglycdn.com/files/4599a93f-af3a-47ad-97dd-f0bc8fb89442/yin_r._2014._case_study_research_design_and_methods.pdf
    • https://s3.amazonaws.com/pezofut/bovutajunipigekage.pdf
    • https://uploads.strikinglycdn.com/files/d527e271-7689-499e-8f82-92765554c974/what_is_adverb_and_its_example.pdf
    • http://vuremekewema.rf.gd/bowezamujanodusiv.pdf
    • http://dakafatuvuguviz.atwebpages.com/baixar_gratis_livros.pdf
    • http://telimagafire.epizy.com/58136628737.pdf
    • https://uploads.strikinglycdn.com/files/bdbc3849-817f-4b27-aac7-321122a387be/kowakenudisalal.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_off0000d9fd.bin
1f0ff059eebe2d0656ec09e5711a03bf47c57150f762acc6e7392b20ab24de3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 5812 bytes
font_01_sfnt_off0000edac.bin
c2b40cba2b8e1e3d55c16f3d0545f6e8763ca269f88b7ad67f535161c98ec390		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 9952 bytes

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