Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fab0d5d84b0ccf…

MALICIOUS

PDF

72.0 KB Created: 2021-09-01 23:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 455cf15e611c0d4657b43af4e2f58491 SHA-1: 7398c9c7b8ac49be196c117a45d3c20debfc89b5 SHA-256: d4fab0d5d84b0ccf8e7f90843c8afef43cd709ab451819532353a4150484fd42
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised CMS upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8255

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.
  • 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
  • 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://skolicka.eu/foto/images/file/pivaduxulorilijajeje.pdf In PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/o48cig60id55iudod7g2enacrh/33522790211.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31690e7b58---50355711451.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/161061e166c631---63035269486.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/vajidarisirupitatuw.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e37f4ab1b5---46857419943.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ddfbbf8cc6c---lekefovar.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/0nv8as6h69ac2abv5oe8k6nt96/visitenovil.pdfIn PDF document text
    • https://pepsima.biz/files/file/84342558734.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/92313829916.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/wakakekirivoxudigibuniboj.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/87502977820.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/pibon.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c77b9c2731b---42349011959.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/16373516523.pdfIn PDF document text
    • https://turbooto.vn/upload/files/9247072838.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/dufijitutavesimarogup.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/092104385530.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/sovesaligol.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/40390033737.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b187821faa6---vifinovunugefapusixovola.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867927d6ec3---banuritema.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/zebovuzid.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/11095305282.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160fbf600baa77---mavafotulexuwanabilov.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/20gv6uthg5nr61vabqq2kghv92/88217303072.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/63425362814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=introduction+to+computer+science+notesPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAC 18648 bytes
SHA-256: 34c4b44dabb8cd549c18e0c897a92d5411bb4e06bf6ba4316daa6278025ef599