Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f414f9dec1b641…

MALICIOUS

PDF

85.4 KB Created: 2021-03-18 08:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2d7ff049c88e20482ac26ea4f86720b SHA-1: 7b2ecfc3affa2e330aabd12b39c05f3c2ee114ea SHA-256: 77f414f9dec1b641b1733d19ae462be7cd63201ea32d68ed9a93c471b8d0bd0f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a domain associated with malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to file conversion, which is a common tactic for tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=base64+to+pdf+html
    • http://jidonuse.iblogger.org/excel_2016_edit_shortcuts.pdf
    • https://cdn-cms.f-static.net/uploads/4500200/normal_603bc8ae50bc2.pdf
    • https://cdn-cms.f-static.net/uploads/4446494/normal_5fdbb592c72fd.pdf
    • http://mimedilubaj.22web.org/tevixupig.pdf
    • https://static.s123-cdn-static.com/uploads/4385617/normal_5ffe73363b918.pdf
    • http://bowoporoj.iblogger.org/gta_liberty_city_stories_pc.pdf
    • https://static.s123-cdn-static.com/uploads/4373769/normal_60087c627a617.pdf
    • http://fulusixavopowem.iblogger.org/sezof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zozuxukoxo/30639423079.pdf
    • https://s3.amazonaws.com/topipovikapari/ay_santa_maria_cancionero_de_palacio.pdf
    • https://s3.amazonaws.com/venunamazozuzo/57988627595.pdf
    • https://s3.amazonaws.com/takebemanijewok/74388805985.pdf
    • https://s3.amazonaws.com/panalipolifod/international_business_management_jobs_in_abroad.pdf
    • https://s3.amazonaws.com/tobito/51722294375.pdf
    • https://s3.amazonaws.com/sugosubexez/78014644225.pdf
    • http://bupizaxumora.epizy.com/massey_ferguson_35_serial_number_location.pdf
    • http://beturatigamoli.epizy.com/85492533298.pdf
    • https://s3.amazonaws.com/kikunojulejuj/46782585213.pdf
    • http://pupokimixuveted.epizy.com/beronuxakizevej.pdf
    • https://s3.amazonaws.com/mokuwanibof/angular_json_schema_to_form.pdf
    • https://s3.amazonaws.com/posufij/heart_anatomy_worksheet.pdf
    • http://zopelusesududo.rf.gd/2108765425.pdf
    • https://s3.amazonaws.com/fajujiju/11869155959.pdf
    • http://kusugafunerepo.rf.gd/51534986751.pdf
    • http://jewojaregoluwat.epizy.com/32928295973.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_off00010f37.bin
1c64465e42a04170285f32c1c1ae2fc45ad38b5763e2b803224018d6a38d491c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F37 5476 bytes
font_01_sfnt_off000121bd.bin
ea89436ae35c1311416be4e62ccb80ee3cdd20ced5fa5c24a940b8053f92eb09
pdf-font-stream PDF embedded font (sfnt) at offset 0x121BD 11048 bytes