Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9459d582267d89b…

MALICIOUS

PDF

89.2 KB Created: 2021-09-10 03:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 51a39c733dfa80661818bd095dc7d779 SHA-1: 939239c06a5d4feeade40d8812fc5959cb71dd1d SHA-256: c9459d582267d89b18ceab1c9e48aa240919a86f2110d789ecb9dfb58d7db631
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/juvadilawero.pdf In PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/1677985848.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a2416274a---vowomugom.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/xubefirixujod.pdfIn PDF document text
    • http://photo-ostrov.com/ckfinder/userfiles/files/forowejefenetusugezulelo.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9dfeedddd---71115862059.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/fatupuxixemakosa.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/11816644715.pdfIn PDF document text
    • http://peknanevesta.sk/media/file/63131571579.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/dipozitamububajava.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/sajojorokosoluposopeneto.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/wezovuv.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/1450480920.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/renezagurebaz.pdfIn PDF document text
    • http://melabo.com/upload/files/zawosadogofotuwu.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/34062351537.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/binoxafuk.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/fivejutezod.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/juxujutuba.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/bosik.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/zivejapafamelu.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/88500738648.pdfIn PDF document text
    • http://palakkadtourism.in/ckfinder/userfiles/files/gutasoxupozewiradajukuji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=300mb+mkv+moviesPDF 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_off0000f7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CF 18336 bytes
SHA-256: eb3f65660b0d2f1d9530dcb30b686cd5f096dc665e859b851b6d1603e2198eb3
font_01_sfnt_off00012853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12853 10256 bytes
SHA-256: 1a5f1beeb5136406ce6e6ce1acac6fa8d396716d2d308202c2e08e58e11f1998
font_02_sfnt_off00013f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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