Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea464024258fe3f…

MALICIOUS

PDF

82.9 KB Created: 2021-09-09 00:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9a30c2fc0fd4b99758bb50ae46dbd37f SHA-1: 233fa7e10c521f9296fa2eb7a813d7c708f1ba04 SHA-256: eea464024258fe3f27a3843cb1877391fd9d16e8302be24fdedfaf1b75c05381
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute code upon opening. It also features a high number of external links pointing to a link farm, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://prodottoitalia.eu/userfiles/files/49654396745.pdf In PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bupuvazasad.pdfIn PDF document text
    • http://cleanenergy.mn/uploads/files/lamodij.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/55368506785.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/79585903863.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/kutijipepugojabip.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/88129787209.pdfIn PDF document text
    • http://acelybio.com/upload/files/26307828251.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/govobezusamuruxu.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/vopomidikemakex.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/38187743812.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137aee9b552a---23176884976.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/superiluzeta.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/23426134273.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/xujapopalobuxi.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/vilivelofupiz.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/76789300487.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/vakowozox.pdfIn PDF document text
    • http://midoriku.zaitakunet.jp/app/webroot/upload_images/files/xuxam.pdfIn PDF document text
    • https://economiadecomunion.net/ckfinder/userfiles/files/gizuzobibikakosu.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/zivuwa.pdfIn PDF document text
    • http://faithleader.org/js/ckfinder/userfiles/files/gisolusaramudorag.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/nilojawakiwexufaduv.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384f9f31eca---tisixuwutekinepeduripi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=co+op+games+for+3+playersPDF 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_off0000deef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF706 10724 bytes
SHA-256: aa30edc8d95233a2f27ef1668f233f0fbfcb3c1d97b16c66a2c5e96a3d320f7d
font_02_sfnt_off00010fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC2 17908 bytes
SHA-256: c803c4fe2bcd9061cd35c1d61d4ad459569e5e8e771737aa37f81f5346be6aaa