Malicious PDF — malware analysis report

Static analysis result for SHA-256 259f586f579f0538…

MALICIOUS

PDF

74.9 KB Created: 2021-05-23 15:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 335825046463be983f59dc4d958082f4 SHA-1: da1c67f97ae2081c6899a49a6ba231d5d0785a01 SHA-256: 259f586f579f053843aad2712ec4ebd13b63f9e51c84e49a8d78a5017e46c8ee
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site disguised as a driver's test preparation resource. ClamAV and ML classifiers strongly indicate malicious intent, specifically phishing and trojan activity. No scripts were extracted, but the presence of an external URI is a primary indicator of this attack.

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://leonvi.ru/strik?utm_term=how+to+study+for+arkansas+drivers+test
    • https://static.s123-cdn-static.com/uploads/4366947/normal_600558be7fa20.pdf
    • https://cdn-cms.f-static.net/uploads/4467601/normal_600ae0925fa02.pdf
    • https://cdn-cms.f-static.net/uploads/4366357/normal_6028215db17bb.pdf
    • https://cdn-cms.f-static.net/uploads/4447270/normal_6046818c0163d.pdf
    • https://static.s123-cdn-static.com/uploads/4478703/normal_5fe1fa73d73c7.pdf
    • https://static.s123-cdn-static.com/uploads/4476566/normal_5fcd3114669bf.pdf
    • https://cdn-cms.f-static.net/uploads/4471467/normal_6056574e32ad1.pdf
    • https://static.s123-cdn-static.com/uploads/4447096/normal_6000da0f387a9.pdf
    • https://cdn-cms.f-static.net/uploads/4413242/normal_60542413697dc.pdf
    • https://static.s123-cdn-static.com/uploads/4447108/normal_5fec547f9e37c.pdf
    • https://static.s123-cdn-static.com/uploads/4426090/normal_5fc86c6aee247.pdf
    • https://static.s123-cdn-static.com/uploads/4423155/normal_5ff06c98c9905.pdf
    • https://cdn-cms.f-static.net/uploads/4368949/normal_604e8b49c8a27.pdf
    • https://static.s123-cdn-static.com/uploads/4447663/normal_600380ac30d19.pdf
    • https://cdn-cms.f-static.net/uploads/4410414/normal_606766e4d0f12.pdf
    • https://cdn-cms.f-static.net/uploads/4413573/normal_606588ed19dd8.pdf
    • https://cdn-cms.f-static.net/uploads/4475389/normal_605f885d20555.pdf
    • https://static.s123-cdn-static.com/uploads/4404500/normal_5fed0a52710f6.pdf
    • https://cdn-cms.f-static.net/uploads/4482219/normal_602c15593094e.pdf
    • https://cdn-cms.f-static.net/uploads/4451932/normal_6051184233948.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/geraromu/36283483755.pdf
    • https://s3.amazonaws.com/lanubili/the_hunger_games_mockingjay_part_3_full_movie_download.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_off0000e6e5.bin
99f4f83cf9f552522543d52c2e524887de3e0c6089fd18f57ecd19994f25dcb1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E5 5148 bytes
font_01_sfnt_off0000f892.bin
6613fd47679ab1d50e9f481e4a9ab742596add8806355b884029a316c2fb8472
pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 10500 bytes