Malicious PDF — malware analysis report

Static analysis result for SHA-256 0028d4b690047e40…

MALICIOUS

PDF

70.9 KB Created: 2021-02-26 16:24:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a46f335fdff747cf57fbe26029ffe2d0 SHA-1: 27a6018078b1ff3a6704a31df55572074250841c SHA-256: 0028d4b690047e407a562128ec3958bfd3a66acd14e7452d857c158cead8f477
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'baarspo.ru', suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9731

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/award?keyword=premium+dictionary+english+apk+1.0.9 PDF link annotation
    • http://1cats.space/lego_ninjago_minecraft_texture_pack_1.8p0ako.pdfIn PDF document text
    • https://favimorujupufu.weebly.com/uploads/1/3/2/7/132710565/gibowepid_wetiginepupura_vetig.pdfIn PDF document text
    • https://xarudaxukisa.weebly.com/uploads/1/3/4/0/134018653/1701511.pdfIn PDF document text
    • https://jarowuvuvam.weebly.com/uploads/1/3/4/6/134614172/nibeseseponogis.pdfIn PDF document text
    • http://prodson.space/citra_emulator_android_best_settingsckm2d.pdfIn PDF document text
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/binatoxulemi.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/zupenafud/45937136944.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/befunoxogelopu.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/iowa_mandatory_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/fundamental_trig_identities_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/answers_for_the_impossible_quiz_unblocked.pdfIn PDF document text
    • http://nijufunirel.rf.gd/haitian_injection_molding_machine_troubleshooting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/kavetikomuxusarov.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/humble_bundle_app_won_t_games.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/ccass_participants_shareholding_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/coliforms_indicator_organisms.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_off0000fe69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 6036 bytes
SHA-256: fdaeba638829248c10a9fafed51e2864f1e42a02da6821cca58f09a6ed6de618
font_01_sfnt_off000112cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CC 2504 bytes
SHA-256: 0ee854a24b89f7ee8570bbc505c50a6667f3068117e125e0485dee6a0a160261