Malicious PDF — malware analysis report

Static analysis result for SHA-256 52c470dc7c4c5f94…

MALICIOUS

PDF

54.6 KB Created: 2021-06-03 18:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a76a3f693fadd770da1d6d04297a89c SHA-1: d4084a82b95cc1b79f7e0d2ba71aef2c4f236930 SHA-256: 52c470dc7c4c5f949c443d224cd9afe002ceae578eb6dc50e800e607b063e619
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'Tarkov trial codes 2021', likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

Heuristics 5

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=tarkov+trial+codes+2021
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/cjo8skenad1k69vuplsg00u6go/33644998067.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f620e2cbc2---zojapizowisolosepiz.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd3eafab1---pipilekeva.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5a7f1b26ea09dc72ed2244523c7e28b5/kiridifosopera.pdf
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/konituwuru.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/64be6db47c7b3186814b1cff682fddab/mikinajemozakatajafatebaz.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/c2b049d90f72714b4c591d82dd032268/51542780784.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6f9cbf0c9---99000187820.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/b54574ac5ddf5c7514b693d53e9776be/88118447351.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/9671e2888cb71e02f76237ad88a9fbe9/vafevenabemopasosevexi.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3aae8cf2d---84637971226.pdf
    • http://vdadanang.vn/app/webroot/assets/files/4644975669.pdf
    • http://travelport.pl/userfiles//file/bogez.pdf
    • http://vitanova-cattery.com/upload/file/12502208117.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/d48a1c832a77024f4a737d6e49b6f703/jakitajelejuw.pdf