Malicious PDF — malware analysis report

Static analysis result for SHA-256 a576e25369c26db0…

MALICIOUS

PDF

76.4 KB Created: 2021-03-21 21:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c306145e519a8e5d52ae6362d75c76f9 SHA-1: 220592a5d2429828ca5320a762ddef0aada54d3c SHA-256: a576e25369c26db0ff9e303a0b15b3a171f65ead1fb7179368fa515923b07884
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by heuristics as an external URI and an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

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://soxebez.ru/wix?keyword=procedure+manual+examples
    • http://jotelefaxomawut.22web.org/is_there_gonna_be_a_season_3_of_the_exorcist.pdf
    • http://zulurasovuguloz.66ghz.com/em_basic_chest_pain.pdf
    • http://gaveguguxa.iblogger.org/tasomigep.pdf
    • http://superheatbelt.xyz/24_anil_kapoor_season_1_free_downloadjb8gm.pdf
    • http://leopolds.space/beamer._cls_latexxvt5c.pdf
    • http://top-salez.site/279812518106i8ds.pdf
    • http://kartaidatodemeleri.com/21323359765iyopr.pdf
    • http://wildboost.club/wamapepepusizuwudibimavuf5h34y.pdf
    • http://8bitbeardsco.com/heroes_of_the_feywild_downloadmwef7.pdf
    • http://cardio-active.site/jemokaroperubob49lt.pdf
    • http://trydouche.xyz/formula_para_calcular_el_volumen_de_un_prisma_recto171wq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wovugi/cpr_call_blocker_v5000_manual.pdf
    • https://s3.amazonaws.com/fadedosi/bni_gurgaon_full_form.pdf
    • https://s3.amazonaws.com/daniwodug/megarevowiwirofukenubo.pdf
    • https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_a6f8ddbb10064ea28f842c0b9fff54a5.pdf?index=true
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_c9532543e9eb4c90b9a4856711e5171b.pdf?index=true
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_1d8456c8147345ef9e6a9d1e89876dc3.pdf?index=true
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_8dd3cd20eca741b497b52e29f0de19d2.pdf?index=true
    • https://s3.amazonaws.com/sefiwegegagu/film_at_cafe_6_sub_indonesia.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_62a491e3bc8147c883a024639c788de3.pdf?index=true
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_369fc6978b894dc0b8cf32b0bbd19c16.pdf?index=true
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_d2a6aa5390554c1e8f920a58b36c2c53.pdf?index=true
    • http://woxeladigono.rf.gd/the_endless_summer_poster_nz.pdf
    • https://s3.amazonaws.com/napoledunadigo/tokokutidove.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_off0000f040.bin
7ebbe8d51307c08476d7e5e0e2bc10b83ef2f39dbe6e86f3f858358eb1a06a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF040 5288 bytes
font_01_sfnt_off00010220.bin
154324515e8fb7f977855418cfadea062a9c138f2dbb59a096911c0a120bee67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 10060 bytes

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