Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d64f66ff0f01499…

MALICIOUS

PDF

62.8 KB Created: 2021-10-02 20:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7bce430f246adb51ba82fa8a2fc235e2 SHA-1: a2dffc4e0125e9740f12d838277fd0f42dfa8598 SHA-256: 9d64f66ff0f014995a9ec3a7c77d24854e70b40923da5e9c91df0305d9ef4dfc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of a link farm pointing to multiple distinct hosts, including compromised CMS upload storage, suggests an attempt to obscure the final destination and evade detection. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5956

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.
  • 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 https://piphoto.tw/uploads/files/202109080518592207.pdf In PDF document text
    • http://araratmebel.ru/img/file/87385917708.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161402fd70ec71---funad.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/vejetirepiz.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/jopelotovo.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/3605233501.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/4846124213.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/pamonebolow.pdfIn PDF document text
    • http://articolo17.it/siti/usr/foto/files/76463481816.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210914125107.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/88464789029.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/44fa8ee63a98153a7e537acc759667c8/vubarov.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/xujusajotud.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/sataxe.pdfIn PDF document text
    • https://medius.sk/userfiles/file/fivilenexib.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144f7055af40---53963291621.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/15130938378.pdfIn PDF document text
    • http://rjt1.org/upload/files/44097874523.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/tulelumuzawawiranax.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/wogimorowexazisokuxu.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16141fb1677427---wovawejamiwivijupiwevapu.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e08af7ba27---85805414794.pdfIn PDF document text
    • http://www.ezmoving.com/file/mawizikajuxexutofinenep.pdfIn PDF document text
    • https://datawire.gr/files/files/52984875606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=the+year+without+a+santa+claus+john+goodmanPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE47 11208 bytes
SHA-256: d77f69bfbbb6f9e451a8a7d04bb5fc9dd41cc98bab4e5e2f6fd1fea102c93035