Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a31bd39de9c1ad4…

MALICIOUS

PDF

82.8 KB Created: 2021-02-28 13:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1d00bb0826fcc4b22d54b200e51e2b6 SHA-1: d6498408aa8f8b9d180504be17e0b7791150236b SHA-256: 8a31bd39de9c1ad41389088bf158134e7feaa014f33160ac3c4adc1ce0148967
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 URL, which is a common lure for phishing attacks. The document body, though heavily obfuscated, suggests a lure related to a video game guide. The presence of a malicious URL and the ML classifier's high confidence score indicate a phishing attempt designed to redirect users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/wix?keyword=mhw+bow+guide+iceborne
    • http://barcaporirternet-interbank-pe.com/rosenezikupafuvwj8hd.pdf
    • https://cdn-cms.f-static.net/uploads/4466679/normal_602308c16e2e0.pdf
    • http://boforotaje.mywebcommunity.org/33633127833.pdf
    • http://juzufezike.mygamesonline.org/casio_5302_ga-1000fc_manual.pdf
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5fff0f61cc218.pdf
    • https://static.s123-cdn-static.com/uploads/4490364/normal_5fedabb456b2b.pdf
    • https://cdn-cms.f-static.net/uploads/4470526/normal_601a0f8a8533d.pdf
    • http://hookup154.site/grim_dawn_fleshworkssshgf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fejakixoweka/executive_chef_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/sobaketemu/robesojuriwetujinidoboj.pdf
    • http://xikufozumif.epizy.com/camille_jg_guide_s9.pdf
    • https://s3.amazonaws.com/sinamozagemoger/17318434613.pdf
    • http://lujebanamof.epizy.com/66804043077.pdf
    • http://bifovigavij.myartsonline.com/94348670720.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e1.bin
8649b53fae948745bdd8664b4bc9852e82984bd72637c90fef2e336c8709e95c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E1 5016 bytes
font_01_sfnt_off0000fa0e.bin
180e0d3ce412f97b4e6101f9fac9af7500f65df322d51f7e14b0e6e7fb8dfcbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 14840 bytes
font_02_sfnt_off00012806.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12806 16092 bytes

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