Malicious PDF — malware analysis report

Static analysis result for SHA-256 c061d3905d70f463…

MALICIOUS

PDF

69.6 KB Created: 2021-09-26 00:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 13b0c12819dd14dfbc0c992f5dbd70d0 SHA-1: 33ccba5060c5366832aeba45a0c27847a696acce SHA-256: c061d3905d70f4633cdd37cc8b8c4c6620cfd05433a39d4df10c689365ab8f02
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'safeabortionnepal.com', suggests a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attack pattern involving malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • 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 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 http://safeabortionnepal.com/userfiles/file/zevujoja.pdf In PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/29157730461.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/848c1296c4e10f672691f3088130edb8/15309869007.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/webov.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/48314138901.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/kiveviloxijesi.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/98853884768.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/24012655993.pdfIn PDF document text
    • https://tradegateindia.com/userfiles/file/vumugatudisisu.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/zulijurawagukiwir.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/2332922434.pdfIn PDF document text
    • http://onelove.cz/file/dofufufaw.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/87782284202.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/tebaponaneveronupi.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/lalaxunizuvetajawa.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/70970396448.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/31208139332.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/71606968359.pdfIn PDF document text
    • http://nhakhoauytinhaiphong.com/upload/files/57943461463.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/1260863038.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/22616157971.pdfIn PDF document text
    • http://novena99.com/uploads/files/202109251156222230.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbffcc647d---govuzezorigezegig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=mac+startup+loading+bar+stuckPDF link annotation
    • 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_off0000b1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A4 10884 bytes
SHA-256: 9220ca589e7f44b769454b9ec70b8dc92f32bf42d95adac0b7c5965451dbd035
font_01_sfnt_off0000ca7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 14996 bytes
SHA-256: e33fe301c39ee0fd6b02dea6f73be98f71d7c6c1b423e82498d70179c1ee6a3d