Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e58503cbb5e8ba…

MALICIOUS

PDF

85.2 KB Created: 2021-09-21 00:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 45c19dabb2f8ab6341446bc040997f78 SHA-1: 0881fcc6afc206bb7e2618e36af1898af47da244 SHA-256: e6e58503cbb5e8ba629e022116ae6c2e58391c1b82334a8be511b02b4d38b311
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to unknown domains, suggesting a link farm or redirection mechanism for phishing or malware distribution. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM further supports this, indicating a large number of links on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://gyn-koe70.de/obrazky/file/jozubudikimon.pdf In PDF document text
    • https://powerliteaac.com/userfiles/file/76390827675.pdfIn PDF document text
    • http://malifer.hu/upload/file/xigepejelobon.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/nokiwofa.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/31846619433.pdfIn PDF document text
    • https://coil.hk/upload/files/17045003989.pdfIn PDF document text
    • https://funke.be/data/file/manadelubupofudupenup.pdfIn PDF document text
    • http://all-premium.com/user_file/files/74615805299.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/84313225454.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/tagawurobixut.pdfIn PDF document text
    • http://herve-coiffure.ci/files/52143676448.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/23263848126.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/67153921675.pdfIn PDF document text
    • https://aildf.in/userfiles/file/99578354113.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/90445672341.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/97564820767.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/64034645632.pdfIn PDF document text
    • http://www.farnostbobrova.cz/ckfinder/files/34747513858.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/74874590374.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/77852150947.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/99211989983.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/b72938c30fd5e0e53ee52c3e8c5aeb5b/dexite.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/95388500444.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161408edc3bf3f---jufolapove.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/fofexoru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=free+recharge+apps+downloadPDF 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_off0000e804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE804 10668 bytes
SHA-256: f40f94e3c256bb8148bba427cc796b57b3877723d5f2f450f5b85cf8cdd332bb
font_01_sfnt_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 18236 bytes
SHA-256: 59e17124bc6113ce122631ccdd285d8dd8e0316c2fe4c41cafa999928dbd7832
font_02_sfnt_off00012f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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