Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2f6a5309ad11f7…

MALICIOUS

PDF

76.5 KB Created: 2021-09-23 13:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4689aef45ea94b65b747c00ecabe445c SHA-1: ebab1dd5557fe58703e3a8d8175b10f2c53c0418 SHA-256: ea2f6a5309ad11f770722efbc4c8e6361ffa89d311d81a04cb0bffd3be946cb3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The presence of external URI heuristics and the PDF_SEO_DISPOSABLE_LINK_FARM rule further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/uplcv?utm_term=one+piece+stampede+kissanime PDF link annotation
    • http://hoadon-dientu.net/images/files/bofuranizefix.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/rogexadememotejojamunobu.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/wemugitomata.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6118020b6---putajepinetifi.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/pizisexubobomekusunirodo.pdfIn PDF document text
    • http://juha.be/_files/file/maguxajifi.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/80008344862.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210916210201.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/70172062309.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/48064664279.pdfIn PDF document text
    • http://amirmazandaranihospital.com/ckeditor/files/files/4420680031.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/45727148910.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/03737253f919ca518b8746f0f625642c/22365799067.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/beladipizidatetonufabe.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/xojezebub.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109130252011592.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/25541257071.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/zepapez.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/felamig.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/6066427420.pdfIn PDF document text
    • https://proxus.nl/file/63327405816.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/40151085774.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC338 10528 bytes
SHA-256: 632e3d30dfb28836a9b40ae561e8bd1d11422d9aa89920d88f210c9fdf9c3116
font_01_sfnt_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 18888 bytes
SHA-256: 572509c692f12e7374600d8458a9f95c85bfe7be5df18b6c202c078f37308e86
font_02_sfnt_off00010ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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