Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cb671f246e1d56…

MALICIOUS

PDF

80.3 KB Created: 2021-09-17 04:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 260f9a33febbda6709567469b9d8fc41 SHA-1: 3aa7f681c622a896ab79b7cb188b861f2a83534c SHA-256: 14cb671f246e1d5641042cab5a825a4c928287b003381d96f8e079a268231ccd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm for phishing or malware distribution. ClamAV and ML classifiers strongly indicate malicious intent. The file's structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/wirupijesiwowarawawozupom.pdf In PDF document text
    • http://nusratali.com/userfiles/files/juxotosojaletop.pdfIn PDF document text
    • https://5703n1n6999-6a55.com/contents/files/97269352133.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/zuwap.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/63780439313.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/tefazarimemiwepapi.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d07bc37b63---tofawolisaga.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/645ee3613bc5b9e64422898d342dab70/dipixodokemizovubununapo.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/somilanofinuxowijovanotu.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142965df1be8---9522971759.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/90858016025.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/vaginodifimelu.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/78095938241.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613115062add2---kosavimubufidisi.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/82240159775.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/kisixup.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/82555782864.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/2697386440.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/talinovedamitijew.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/37851413233.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/94203080156.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/wunuxedupidafaxejegun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=sd+card+slot+s20PDF 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_off0000d8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D1 10352 bytes
SHA-256: ec7291c722239ba7a4c19a0e1706c6c7034dfca0331b8a738c484982912ba2dd
font_02_sfnt_off0001085d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 16760 bytes
SHA-256: b8dd36816de4877c59f2eaf89b3d24f00cbceb47809dc7a016f095118514ffc1

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