Malicious PDF — malware analysis report

Static analysis result for SHA-256 247dcfb3decb0420…

MALICIOUS

PDF

73.9 KB Created: 2021-09-14 02:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d7e6a43de9995f51e9edc08e85305ad6 SHA-1: fb676637c72876484449e060d3b727155305dd66 SHA-256: 247dcfb3decb0420a259a17fac88bf24bb9be3facc34fdd0fdab7878cc28069f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Multiple heuristics point to the PDF being a link farm, with many URLs hosted on potentially compromised or disposable domains. The presence of numerous unknown URLs suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://graveyards-fuj.ae/userfiles/files/24126873069.pdf In PDF document text
    • http://pmrs.ps/userfiles/file/83984092791.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/58278729282.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16136d082953ff---78733585602.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/muwilosapetifoniz.pdfIn PDF document text
    • http://imoroz.by/upload/file/sozogapemevowuxerupi.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/47131545356.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202109/file/zeduxupupiji.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161367021c2491---bixatevuvemoxexuxowebalo.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/3721150925.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/bonafakuroxonafen.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1613faed898069---dalovimolinobowojolupazo.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/de53054b9bf0f84853fac59a87a68ad0/fuwoni.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/gefalunoz.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/22434271323.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/xojuzakedogo.pdfIn PDF document text
    • http://oodow.cn/upload/file/210906021413029750ab4l3krgny1w.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/molevusenupivan.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/ririkubetopip.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/nodamirunitaridoberepedak.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/gemodanowobosasi.pdfIn PDF document text
    • http://mcutech.net/upload/2021/09/file/1631317073361174552.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/92972479291.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/89249201146.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=arc+launcher+premiumPDF 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_off0000bcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFC 17736 bytes
SHA-256: 2e96e3b848d8da92b2350eea94a9ebb8a8ecb29af7cb5b7a413567262df8f6c9
font_01_sfnt_off0000ead7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD7 10336 bytes
SHA-256: 965a4cf1e17170912944c9dba6c1ec1f02ee936975edabdd924df98bdb4d0fa6
font_02_sfnt_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1