Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf821771699d69e…

MALICIOUS

PDF

72.8 KB Created: 2021-03-31 15:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c687cc45d4982169872a77ecb67b3767 SHA-1: 25ad78c6b3c41f154388436381322447d03cf88f SHA-256: bdf821771699d69ebd9dc52e5594514c61a6aae19d09ac75d47d61c2475d2a4b
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 tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://golowaki.ru/wix?keyword=staar+biology+2014+answer+key
    • https://cdn.sqhk.co/verikiweneza/osiagfO/cancel_my_verizon_apple_music.pdf
    • https://ragajepegoxi.weebly.com/uploads/1/3/1/3/131379061/varero.pdf
    • https://gebodakejodige.weebly.com/uploads/1/3/4/3/134316683/makuleluku.pdf
    • https://jofexudu.weebly.com/uploads/1/3/5/2/135295173/pamore-jeruliveli-jerabininot.pdf
    • https://cdn.sqhk.co/letarezetap/CKsihKb/40504930244.pdf
    • http://raruvutemogogog.iblogger.org/pumixitobo.pdf
    • https://cdn-cms.f-static.net/uploads/4412570/normal_604029e119e09.pdf
    • https://cdn.sqhk.co/dolitife/HpijFlk/mojafuroxavuzupezu.pdf
    • https://cdn.sqhk.co/boxepupovemu/ieijibW/vilotixodiluvofixikuseres.pdf
    • https://cdn-cms.f-static.net/uploads/4379384/normal_6044d36804562.pdf
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/9ad5d437f5ae.pdf
    • https://cdn.sqhk.co/vabolepibe/jiupjgy/nogesuvofeke.pdf
    • http://tomesopinobiz.iblogger.org/nigejininejavizuvoba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://novuvajuvenexe.epizy.com/backbone_design_in_computer_network.pdf
    • https://s3.amazonaws.com/zopenave/53943987510.pdf
    • https://s3.amazonaws.com/godewumazek/34139907859.pdf
    • http://tikolikenugim.epizy.com/aptitude_test_tips_and_tricks.pdf
    • https://s3.amazonaws.com/wifiduxezo/universal_audio_apollo_8_manual.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/acetate_sheets_for_stencils.pdf
    • https://s3.amazonaws.com/gewisetug/straighterline_microbiology_exam_1_answers.pdf
    • http://jovigoxuja.epizy.com/vituduvuxupuruwumetowese.pdf
    • http://varewokumozikon.rf.gd/negizalewoxo.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_off0000db15.bin
0e2953fd18b22c7a63b1badbaea4a5f6f36b56df5533d0d9fdcb054345167e14
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB15 5768 bytes
font_01_sfnt_off0000eee7.bin
432a253957c079d80cb04f9afcc5e186596ea27e13f66ef006d97a02e6d9e918
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 10964 bytes