Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad49343b9187617…

MALICIOUS

PDF

87.6 KB Created: 2021-03-19 23:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6688af8fcf1c38ac8f702526c1871d0 SHA-1: 40e65332a05d4dc39a31902ce907c10af3077c39 SHA-256: 8ad49343b9187617bee603f83b3ed576e343705514f4e79e651a7c22b6d6acf7
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating phishing and trojan characteristics. It contains an embedded URL that directs users to a suspicious domain, likely as part of a phishing lure disguised as a study guide. The PDF structure and embedded content suggest an attempt to exploit user trust for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=latin+america+study+guide+6th+grade
    • https://cdn-cms.f-static.net/uploads/4480904/normal_5fda84fd0985b.pdf
    • https://cdn-cms.f-static.net/uploads/4502236/normal_605482d06eea1.pdf
    • https://cdn-cms.f-static.net/uploads/4447097/normal_5fd7e83e536a9.pdf
    • http://gatofupimekow.mywebcommunity.org/google_to_ms_word_converter.pdf
    • https://cdn-cms.f-static.net/uploads/4426423/normal_602e6cb388880.pdf
    • http://mozovurezet.iblogger.org/88885754589.pdf
    • http://dagavelowewinoj.iblogger.org/will_mcavoy_why_is_america_the_greatest_country_in_the_world.pdf
    • http://sozerujodurepef.22web.org/nitecore_i4_instructions.pdf
    • https://cdn-cms.f-static.net/uploads/4385436/normal_60146a2f4852a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xuzakob/schwinn_airdyne_evolution_comp_parts.pdf
    • https://s3.amazonaws.com/muvarelo/7882626534.pdf
    • https://s3.amazonaws.com/metubevozisul/data_science_bootcamp_job_placement.pdf
    • https://s3.amazonaws.com/joterige/ligumubomafesogobititu.pdf
    • https://uploads.strikinglycdn.com/files/09d5e3ea-09dc-4efb-bd53-a4a8345dd217/34674594235.pdf
    • https://s3.amazonaws.com/dedinavesute/freshwater_aquarium_fish_pictures_and_names.pdf
    • http://jozivunawitud.rf.gd/church_information_in_kannada_language.pdf
    • https://uploads.strikinglycdn.com/files/74a99466-abb6-45d0-8045-e22844fae60c/tujepipunepavotal.pdf
    • https://s3.amazonaws.com/dazinibonofobi/19763512251.pdf
    • https://s3.amazonaws.com/tunenijexe/pericarditis_treatment_guidelines_2015.pdf
    • http://gototura.myartsonline.com/reretolejokogi.pdf
    • http://nizowozutagele.atwebpages.com/62469315983.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_off000117ee.bin
527fe6caea7778ad496b2ed72284ef3cdd549900d5cc17b4308584e8bc38b879
pdf-font-stream PDF embedded font (sfnt) at offset 0x117EE 5520 bytes
font_01_sfnt_off00012a90.bin
db29160c19b61a4333b74329c6a584f97e84a13754f98c552c8ca3cc9a67284e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A90 10924 bytes