Malicious PDF — malware analysis report

Static analysis result for SHA-256 19957d1bffb2e99b…

MALICIOUS

PDF

78.7 KB Created: 2021-04-08 04:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c40a588e4844442ec037e896e21536b2 SHA-1: dd52032818d0f42ada61390d611591abb8f3d85f SHA-256: 19957d1bffb2e99bca822b72d95f35a6c2e4206668e2c431f803f235676f8903
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to medical device troubleshooting, aiming to trick users into visiting the malicious URL.

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://lozipotod.ru/wix?keyword=remstar+cpap+machine+troubleshooting
    • https://nuvefozilif.weebly.com/uploads/1/3/4/7/134733792/7953587.pdf
    • http://xariketixagat.mypressonline.com/topalowi.pdf
    • https://cdn-cms.f-static.net/uploads/4388041/normal_6011bc5ec7cd1.pdf
    • http://tinesemexogo.mygamesonline.org/68202914250.pdf
    • https://tevipane.weebly.com/uploads/1/3/2/6/132681072/jimosojebepavubo.pdf
    • https://static.s123-cdn-static.com/uploads/4387420/normal_6005f14f2607a.pdf
    • http://becloud.website/mksap_vs_medstudyxxzrb.pdf
    • https://sapigufebo.weebly.com/uploads/1/3/4/5/134592603/fubibexetiko-dawemerovawik-femibifusedinu-dosoj.pdf
    • http://vpntop.info/embriologia_clinica_moore_9_edicion3nvlx.pdf
    • http://iciapp.xyz/filodobekowe5bvsh.pdf
    • https://cdn-cms.f-static.net/uploads/4409238/normal_5fe708189ee4e.pdf
    • http://mazejofeg.mygamesonline.org/jubojojejaj.pdf
    • http://kazoxizodasese.iblogger.org/6420839311.pdf
    • http://helpcenterbusiness.xyz/are_brother_compatible_ink_cartridges_any_goodlzuv2.pdf
    • http://jazizuzosa.iblogger.org/dotebabamowif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gotenekopibijo.epizy.com/medical_ethics_multiple_choice_questions_and_answers.pdf
    • http://fozatef.rf.gd/instrumental_methods_in_analytical_chemistry.pdf
    • http://kulipipuxafoja.epizy.com/pasijenojulutajobulovov.pdf
    • http://luwemazezabubat.rf.gd/hill_manufacturing_msds_sheets.pdf
    • http://jajujej.rf.gd/munex.pdf
    • http://kaloruligot.onlinewebshop.net/lodikep.pdf
    • http://vagawujososoje.epizy.com/comment_installer_une_camra_ip_de_surveillance.pdf
    • http://zedagemutumus.rf.gd/specified_platform_toolset_v120_is_not_installed.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e865.bin
adae4e5161b150d9c5b7300dd28c33964804066d068406567837fd98528e95d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE865 5376 bytes
font_01_sfnt_off0000fa7e.bin
5ef7e0b08032ff12b0dae3400e1a583cdbe2598fdcf51c274c4dd0dbdd8bca94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7E 10800 bytes
font_02_sfnt_off00011f2e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2E 4324 bytes

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