Malicious PDF — malware analysis report

Static analysis result for SHA-256 af83d4be0571916f…

MALICIOUS

PDF

75.5 KB Created: 2021-03-11 11:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73cd672fe19e86829b0448cbd2a2f9a6 SHA-1: 149e6319395cdc1c5d95c332bfe35fea99195c7b SHA-256: af83d4be0571916fd148c7b236cabbf793259f9bcfce415025593faeff0a58c2
136 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a password-protected archive lure. The embedded URL `https://leonvi.ru/123?utm_term=cyberark+enterprise+password+vault+user+guide` and another suspicious URL `http://winoxolupuvil.getenjoyment.net/vunenejulonofuv.pdf` suggest a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to the Cyberark enterprise password vault user guide, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://leonvi.ru/123?utm_term=cyberark+enterprise+password+vault+user+guide
    • http://winoxolupuvil.getenjoyment.net/vunenejulonofuv.pdf
    • http://tawaguf.scienceontheweb.net/what_is_the_correct_order_to_watch_the_marvel_films_in.pdf
    • http://pexiwaz.iblogger.org/adjectives_key_stage_2_worksheets.pdf
    • http://rijoginijamibeg.mypressonline.com/22728548418.pdf
    • http://sefesojobibif.iblogger.org/49360747170.pdf
    • http://tafugegajotu.mygamesonline.org/39580813315.pdf
    • http://fipizilemuwob.medianewsonline.com/2003_harley_davidson_sportster_service_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wutopurejopagus.epizy.com/fodemoxuv.pdf
    • https://uploads.strikinglycdn.com/files/e73cda5a-1cda-4123-93e0-39d8fedccd0a/rifunokivir.pdf
    • http://jopavufugas.epizy.com/dahua_cctv_catalogue.pdf
    • https://uploads.strikinglycdn.com/files/575d5025-d5d6-49af-9f1d-7324057ce13a/xfinity_stream_app_roku_not_working.pdf
    • http://bagobopog.rf.gd/how_to_reduce_acne_marks_naturally_at_home.pdf
    • http://rulafiserize.rf.gd/arduino_uno_programming_basics.pdf
    • http://jumepenitujox.atwebpages.com/nufedikifepakukemuniwapaw.pdf
    • https://uploads.strikinglycdn.com/files/7c22a952-699c-4a1f-a442-ab12362b5104/can_i_bake_in_my_copper_chef_pan.pdf
    • http://wuvasof.epizy.com/51527266933.pdf
    • http://xefujexomige.epizy.com/design_of_earthquake_resistant_building_project_report.pdf
    • http://zekaroja.epizy.com/lead_like_jesus_study_guide.pdf
    • https://s3.amazonaws.com/fapaga/houston_bc_weather_report.pdf
    • https://uploads.strikinglycdn.com/files/a9f9a5fb-90fd-47d7-bf04-2a020d4b92c4/70070980038.pdf
    • https://uploads.strikinglycdn.com/files/ac4046ce-9e35-4d55-b419-7d08d8091cd5/35263142795.pdf
    • http://jarepumemaxi.onlinewebshop.net/16761448170.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_off0000eafa.bin
89d0f5150bbffea37d5302fd7f1d8eeaaf0b5b4392c49103e4329f81da0df5c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFA 5488 bytes
font_01_sfnt_off0000fdce.bin
5fa78341a31b9605e94821f54c66865237b70634dac88c50d12757d5f76d0090		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCE 10084 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.