Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68f07750e868e9d…

MALICIOUS

PDF

69.3 KB Created: 2021-10-14 00:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 120f19f48d52b92b084dfed40485f7cb SHA-1: 9f94b3f5effdf052ee496262b1ac04c402880a94 SHA-256: f68f07750e868e9d60b002a1294cc64b41dc3a101c32f30fb9dcafc73f29e4ca
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to redirect users to phishing pages or download further malware. The presence of embedded JavaScript indicates potential for client-side exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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://oniceh.ru/uplcv?utm_term=roblox+hashtag+bypass PDF link annotation
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/21c8631932c6d1075f0a91073f095ed4/20588080909.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/af208cff8844f1f518225c18f75eecc8/xurazosufetatubaposemev.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/zozaxuw.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/19816662008.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20211004054654.pdfIn PDF document text
    • https://85097781.com/upload/files/rojuletuzaxetosafoz.pdfIn PDF document text
    • http://konstruktor33.ru/app/webroot/files/files/revuwa.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/romokokitizewazo.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/52875911466.pdfIn PDF document text
    • https://pansky.ru/UserFiles/File/sabajavirowali.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153e341be5d9---rolibunetaramupisurori.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16164119cbda9b---rekogod.pdfIn PDF document text
    • http://surtek.biz/image/files/20150411_054727.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/kukid.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1613dbfb7bfea9---tesapasotupajubusugefaz.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/58827997799.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/4649234900.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/fe7ebc4c1c587faeca0fad4b47078c61/nejawepiveme.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/53290003864.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/pazufakexu.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/2adecd744499c5b2d9d30f4173b69996/siwigovodadaxivesotuk.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/92839151141.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1616168c158da9---modixudenotevadu.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///10259652973.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/detinufelajuxi.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/75646850428.pdfIn PDF document text
    • 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_off0000c0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CF 17872 bytes
SHA-256: 524db1fb22b3c180a15400979fe6b3b2491b60c9a41bc2a84382543d223cb8ea