Malicious PDF — malware analysis report

Static analysis result for SHA-256 d228a2e9fd0c6108…

MALICIOUS

PDF

68.9 KB Created: 2021-10-02 22:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5581f0062d4faf6b1bb287cf778d7f28 SHA-1: bfbc14584350f52037519b8cf7eb7ae5af7021c9 SHA-256: d228a2e9fd0c610863bf058e89fadd334b266aa0fa1427b67cbf698b27727b80
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-based content, typical of a screenshot designed to trick users into clicking. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or redirect users. Although no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://topflexsports.com/uploads/36824610001.pdf In PDF document text
    • http://anbao.vn/uploads/userfiles/file/dimafupexe.pdfIn PDF document text
    • https://ksuskalology.com/images/file/jozede.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/91808624984.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/37850077428.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/mataxijuruzebaxenuxegotin.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/zotagikelenivijakesawove.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/dinevitebofabudadade.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/rafogikotiruzij.pdfIn PDF document text
    • https://longhoang.vn/upload/files/zotome.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/zozanefitaxipenabarazu.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/265687822.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/jirusuruxidowenarokaja.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2246604f2---dipevatomi.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/9165726518.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/79669400801.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/28527781685.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/badosajuzaravoli.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/mozudagose.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614de6b2d986b---91698678476.pdfIn PDF document text
    • http://enewind.com/pliki/file/nekedun.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/feburifisa.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/db767e8a52adc8c15303281b47d1d1bb/tewezuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=let%27s+learn+english+class+3+solutionsPDF 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_off0000afd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD2 14084 bytes
SHA-256: 185117ac44a8abb19f40bf9221bd29dba390c82e5b7db2d00de07232a270fa4a
font_01_sfnt_off0000d2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D6 10772 bytes
SHA-256: ab2bafc5387c705894f520eb819b8f1ce10a3b8cb0ce94159121f81cd5ca208e
font_02_sfnt_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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