Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2e5c14a551a919…

MALICIOUS

PDF

89.5 KB Created: 2021-03-12 21:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61b150d8ab66ab4a90d46d7680ef49ba SHA-1: 500fb7469c9fbe0b8bf0c1d014c3446fdaf967d9 SHA-256: 6d2e5c14a551a919101a2ffd29f269eae9eba217af37f3f93aebce16a0b92e7d
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, contains text fragments that appear to be a lure related to 'Acca f1 2020 pdf'. The primary attack vector is likely spearphishing, with the embedded URL serving as the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/award?keyword=acca+f1+2020+pdf
    • https://cdn-cms.f-static.net/uploads/4404966/normal_6019ad3f9dc9a.pdf
    • http://bikejesoxatelo.mygamesonline.org/how_to_access_bios_on_acer_aspire_laptop.pdf
    • http://mutugupepu.iblogger.org/esl_lesson_plan_templates.pdf
    • https://cdn-cms.f-static.net/uploads/4450044/normal_5fe9f7b779fe0.pdf
    • http://mizebojusur.mypressonline.com/types_of_software_packages.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wisotoginiso.rf.gd/who_was_rousseau_and_what_did_he_do.pdf
    • http://kegibuluwuridof.epizy.com/burushaski_language.pdf
    • http://lusunumef.rf.gd/xivotapazonizavurexofozag.pdf
    • http://xezogime.epizy.com/rugiwitusinubabo.pdf
    • https://s3.amazonaws.com/bidemewufa/simple_accelerometer_android_code.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/super_vpn_android_2._3.pdf
    • https://s3.amazonaws.com/baposivarabuj/numero_para_reportar_fuga_de_agua_queretaro.pdf
    • https://uploads.strikinglycdn.com/files/1860655b-04db-4841-a9c3-c417c6d9c1d9/farid.pdf
    • https://uploads.strikinglycdn.com/files/098f014f-c49d-4984-af94-87b095daf0d2/how_long_for_priority_mail_delivery.pdf
    • http://tefefusojobus.rf.gd/17258098993.pdf
    • https://s3.amazonaws.com/rakabexozu/call_of_duty_beta_pc.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa69.bin
468bc0709a13bb66dbe9ae8e0fd6f7f8c32753e45fb29f3ddac4115d67a71627		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 5160 bytes
font_01_sfnt_off00010c11.bin
2a7bffec6a0382a61b955354327a712e7ffa3c771cc5d22c3ac89e008792019f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C11 2472 bytes
font_02_sfnt_off000116f2.bin
1aea383529919cd66650bc0f63e706deed65361999984df96de90073e4538bca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116F2 13896 bytes
font_03_sfnt_off0001430b.bin
9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1430B 16344 bytes

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