Malicious PDF — malware analysis report

Static analysis result for SHA-256 213c4b2dbf604d6d…

MALICIOUS

PDF

70.5 KB Created: 2021-03-16 07:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 852324e1373e90285796e4ba17a1f198 SHA-1: 5c99ed952250088a3c9e2ee43637b02f6fa846be SHA-256: 213c4b2dbf604d6d2190b6465f30aa012643819faa2c60cb4596d15d27052887
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 as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to an 'example marking guide'. The presence of external URIs indicates an attempt to redirect the user to a potentially 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://pelibifir.ru/wix?keyword=marking+guide+for+assessors+example
    • https://cdn.sqhk.co/rubupidorinu/7TcF5jd/lebara_recharge_data_australia.pdf
    • http://fifixerabola.iblogger.org/gurulusopudirozukori.pdf
    • https://cdn.sqhk.co/xezexasag/jaPDhhm/faguv.pdf
    • https://cdn.sqhk.co/torujazelome/ghhxjhF/bank_robbery_robber_simulator_mod_apk.pdf
    • http://porizaritofo.mypressonline.com/best_lower_back_stretches.pdf
    • https://cdn.sqhk.co/nutewakizi/phgjjVO/aimpoint_pro_mounted_on_carry_handle.pdf
    • https://cdn.sqhk.co/xexisini/ifidG27/90650277748.pdf
    • http://vafumukiwafi.iblogger.org/cuanto_es_100_gr_de_harina_en_tazas.pdf
    • http://kijorifoweb.22web.org/damisimatatatud.pdf
    • http://legivupipofu.66ghz.com/29440675104.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dutimajizowa/wixokilifejafaxomakebotez.pdf
    • https://s3.amazonaws.com/wujodibu/sobulirapi.pdf
    • https://s3.amazonaws.com/suxugipipolazog/fopopixixadatozolalom.pdf
    • https://uploads.strikinglycdn.com/files/7534a2c2-fc09-4887-91fa-84c94dfbc50f/85033090915.pdf
    • http://nadefivetokilak.rf.gd/wpf_binding_stringformat_time.pdf
    • http://melaworogafema.epizy.com/64159312515.pdf
    • http://zitadufafasid.onlinewebshop.net/basic_electronics_mcq_questions_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/46f1971a-5ab4-4541-bcd1-121534bba111/midumonerizaraxazog.pdf
    • http://venenexen.rf.gd/98334773631.pdf
    • https://uploads.strikinglycdn.com/files/17ce472f-49a5-421a-8382-022225324079/mulevutevivoxumobimiz.pdf
    • https://s3.amazonaws.com/fosagobomap/83193901511.pdf
    • https://s3.amazonaws.com/kelukakeb/backup_exec_20._3_upgrade_guide.pdf
    • http://surozegefixo.rf.gd/meteorology_agrimoon.pdf
    • http://bugenuvumap.atwebpages.com/39530877395.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_off0000d5e6.bin
afa13e4a1efaa5e41c93603f2c33ca77f219ac86001887e7989d86f3608a9f40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E6 5496 bytes
font_01_sfnt_off0000e89e.bin
0503de1b0f707c8f39613d08f3e04ab7676cbde8bbd58ff2fbfe40177e2a6f75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE89E 10372 bytes

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