Malicious PDF — malware analysis report

Static analysis result for SHA-256 e300868d90bb15cd…

MALICIOUS

PDF

73.8 KB Created: 2021-02-24 07:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c22f4e69381249fc495fe5017a54a1db SHA-1: b766718fe5cc3c903621e800353b36dba260b392 SHA-256: e300868d90bb15cdbe96f8997a4f15b2ab24f5eeed0ab1b429ca21a429cb21cf
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL, 'https://leonvi.ru/wix?keyword=blue+snowball+pop+filter+test', which is the primary indicator of a phishing or redirection attempt. The document body, though heavily obfuscated, suggests a lure related to 'Blue snowball pop filter test'. No scripts were extracted, but the presence of an external URI and the malware detection strongly indicate a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/wix?keyword=blue+snowball+pop+filter+test PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449422/normal_601dcfd6e45e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_5fc9eef200f60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5ff032e61966d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_60215764029e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393346/normal_5feeb63dcabe9.pdfIn PDF document text
    • http://larixulefil.iblogger.org/33787740524.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/i51jT0d/fashion_beauty_salon_salinas_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/4aidvhd/80635474257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_5fe9355c2aa1e.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/lomogas/nefujojolupewenirulofaj.pdfIn PDF document text
    • http://nutonujisebife.epizy.com/optiplex_780_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/shooting_games_offline_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/animation_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/metevuvigukutosu.pdfIn PDF document text
    • http://dekifovep.epizy.com/reditajapo.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_off0000e3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B4 5176 bytes
SHA-256: ffb9e2e8ecac214739a2e5e5ceeccf8c17488345364922951224e740267971d9
font_01_sfnt_off0000f56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56E 10288 bytes
SHA-256: 5dadc9503145092c469f79140a98e4a15ab655603f5ed06bf7652e0ff19dab1f