Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cfdcbe5ed81c75d…

MALICIOUS

PDF

85.5 KB Created: 2021-09-14 07:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d18cd95b9d84ebb920d69fa5981dfeb8 SHA-1: 453a6527049daeb53bd45652394b65d0ccde0a13 SHA-256: 6cfdcbe5ed81c75da2b3dee136c9c0915c4bf09aab59710a95a5978a748a88a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://drafthe.ru/uplcv?utm_term=monopoly+para+android+en+espa%C3%B1ol PDF link annotation
    • https://jv-cms.crazy-jessie.nl/uploads/files/xedozamubelevalujuzune.pdfIn PDF document text
    • https://themis-lex.com/userfiles/files/xetalimodexuvo.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/gaburejosorigawebame.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/tulejugasiwudafulun.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/bofivigazonokase.pdfIn PDF document text
    • http://vinmexindia.com/uploads/kexig.pdfIn PDF document text
    • http://sbairs.com/datas/files/11721413607.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuboforizutu.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/1645473255612ff6e502cba.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/84663099672.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/pesonuluj.pdfIn PDF document text
    • http://esistore.com/userfiles/file/mekojude.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16130acd1e8058---61914123329.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/sigepokiwufexoruforoburas.pdfIn PDF document text
    • http://www.beverburcht.nl/upload/files/53809025057.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/62627971909.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/20157133591.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xakadigomuluzeb.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/20582272501.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/jigebalaluwezorupuxunabat.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/penepunu.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/f9a5a639b26791b603ff4fbe98ea80f7/3390031202.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_off0000e6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 10600 bytes
SHA-256: 3a4f15d711a1a69faa1f80fa742898cb671367c829389d0559ddaaf3abd4958f
font_01_sfnt_off0000fed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED5 18628 bytes
SHA-256: bc65f4c186cf1db91c838070e6a26e278c041cf14ab5265f9933d480afd76ad0
font_02_sfnt_off00012ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.