Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5acedc7ae3df53…

MALICIOUS

PDF

75.2 KB Created: 2021-04-16 04:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3af0fb86feaa90b581e9fbb40ab7f853 SHA-1: 743f7841bb5d12b46eab079e2c27178f306987e5 SHA-256: 9a5acedc7ae3df53ed8eaf086785dcf2f518e598d53cf38904da2473bfd73cf7
94 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. It contains an embedded URI pointing to 'https://xajibur.ru/strik?utm_term=when+i+play+my+guitar+why+does+it+buzz', which is likely a phishing or malware distribution lure. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest an attempt to redirect the user to a malicious site. No scripts were extracted, but the PDF structure itself is being leveraged for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

Heuristics 3

  • 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
  • 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://xajibur.ru/strik?utm_term=when+i+play+my+guitar+why+does+it+buzz PDF link annotation
    • http://gapofar.22web.org/40892071814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_60417b0393021.pdfIn PDF document text
    • http://jirusulixozome.scienceontheweb.net/65280551216.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/97134861694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427799/normal_5fd7d7dad8928.pdfIn PDF document text
    • http://diwokaxojizo.iblogger.org/algebra_linear_equations.pdfIn PDF document text
    • http://rigizaba.iblogger.org/power_smart_db7651-24_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_604d2215f0a53.pdfIn PDF document text
    • http://nefufovej.22web.org/how_to_fix_a_mercury_thermostat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasilew.epizy.com/hpv_treatment_guidelines_2017.pdfIn PDF document text
    • http://winigoset.rf.gd/bakuvupunox.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/crude_oil_report_eia.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/16877747327.pdfIn PDF document text
    • http://rilimopukalus.rf.gd/menama.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/how_to_be_a_corpsman_in_the_marines.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/hoist_v5_used.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/24317745525.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/gift_certificate_hotel_template.pdfIn PDF document text
    • http://mofagadelebedos.rf.gd/call_of_duty_apk_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/56752432555.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/fekokifanimabixus.pdfIn 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_off0000f91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91C 5768 bytes
SHA-256: 3f7953270ef1bb4ba4104330bda9996952314b19f0378eafb3511dbc33248745
font_01_sfnt_off00010cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 10844 bytes
SHA-256: 30f459e95a611adf8da773998aaec91a50661070c3f73aba525691320a35d9dc