Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbef93391e06a02…

MALICIOUS

PDF

77.4 KB Created: 2021-09-09 15:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0109138eeee9cbf4130686935bb0b96d SHA-1: 4c99ec81236c1a0d2ec99bb378a9264c5f4bfa2b SHA-256: 2fbef93391e06a0286c1510278a811181cc0a2b0a7db5f0b6f0a24e453ebb030
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially malicious content, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://mecateengenharia.com.br/ckfinder/userfiles/files/2215089915.pdf In PDF document text
    • http://agro-norwa.pl/userfiles/file/wewuketizusesa.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/45162352333.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/64c4e1899670181773cc7d866220c5c2/wasosu.pdfIn PDF document text
    • https://alkirbilaw.com/userfiles/files/zakijodepiwozo.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/emndbh91a3eoicrnt1t2s6vd59/piwilevumizowevixuta.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/3005024874.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/dilozegigasikuxi.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/zefosekatolo.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/f750ef7793962b145d7de51f30e326fe/16632566183.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/dodorovalopi.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/gonewifanamaviz.pdfIn PDF document text
    • https://expomediainc.com/upload/file/mutal.pdfIn PDF document text
    • http://cartopack.com/Images/file/juliwadejetat.pdfIn PDF document text
    • http://land89.com/ckupload/files/52025972370.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/24257470112.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/netawowafofezaparufemasu.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/94199100400.pdfIn PDF document text
    • http://icbiz.ru/userfiles/file/23749914280.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/rovovanozopimotudako.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/zulaveporum.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/36415722999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=hotstar+mod+apk+2020PDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/gugilekinovike.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_off0000c9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EC 10504 bytes
SHA-256: 8a4bedd5a740dc371e67fbb5a86a38c71945c6a6859655b77111e9ec4836c347
font_01_sfnt_off0000e1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 17860 bytes
SHA-256: 0efcefac4cb48d5ffdc2c3e7f23e83bdf9ed77d640564ac65f5cb6cac0739cee
font_02_sfnt_off00011032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11032 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1