Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8743c0a3f5d1f8…

MALICIOUS

PDF

72.6 KB Created: 2021-05-09 17:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 956c758b2b7bb7d9ecbac51b84855d75 SHA-1: 05214e9c9042d46d6bd21041d008e8f086592359 SHA-256: fd8743c0a3f5d1f84efee6b2b5e85c3a1cf4555d4fe00e7c98251474670a2a14
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains metadata suggesting it's a PDF generated by wkhtmltopdf, potentially masking malicious content. The primary malicious indicator is the embedded URL pointing to 'baarspo.ru', which is likely used to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=fluval+405+specs PDF link annotation
    • http://shopee24.site/16198932081ormai.pdfIn PDF document text
    • http://vknart.xyz/template_exists_rails_5r5nny.pdfIn PDF document text
    • http://winfreeiphone.xyz/pegupafuwugugi8cdne.pdfIn PDF document text
    • http://xufikefizot.sportsontheweb.net/apollinaire_poesie.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/suruwetakop.pdfIn PDF document text
    • http://blubadgehelp.net/236803785631bf9d.pdfIn PDF document text
    • http://wifisef.medianewsonline.com/7546854976.pdfIn PDF document text
    • http://zixonolugajona.iblogger.org/retrocalcaneal_bursitis_treatment.pdfIn PDF document text
    • http://pelubexeto.getenjoyment.net/21118390977.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/social_media_management.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/94325596020.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/zasisob.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/setopemewazositaza.pdfIn PDF document text
    • http://maladovefo.rf.gd/tobesisamadumibokupo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5bddab4-38df-4387-88f5-ee7a00d9446b/troy_bilt_tb200_spark_plug_location.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/sutovokibonoreb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c1eb9d-b55b-4661-b183-808b80a0675e/wutumadenirewobibafatiga.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/galveston_hourly_weather_report.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/black_nobility_bloodline.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/naditajotubitudobomej.pdfIn PDF document text
    • http://ziwejozaz.epizy.com/webubarelalomilimudup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/828388a5-0535-4f11-b016-f29c5480aaf9/best_weather_forecast_app_for_aviation.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 5200 bytes
SHA-256: 20f46b188a7b4ab4a4e7f17056bac9f4b1651d424cf0c81872a4d576d6ed4616
font_01_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 10548 bytes
SHA-256: 91aa3c15ffa7e2e55bd5fc994de5694147f0ccdaef9799d18503fcff98bac007

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