Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2202b032723471…

MALICIOUS

PDF

60.9 KB Created: 2021-09-15 17:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d1c08c8f9ae7afe12095dc8ac522e96e SHA-1: 9137a2de68defe9d8e66bcc79e3c959af468eb58 SHA-256: 5c2202b0327234718e6c33a191fba353f864ba70e9b7207daf7ee283274b595b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and presents a link farm pointing to compromised WordPress sites and other disposable hosting, likely to facilitate phishing or malware distribution. The presence of external URIs and link farms suggests an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8000

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 https://irlanc.ru/uplcv?utm_term=wifi+hack+show+password PDF link annotation
    • https://998.geektic.com/geektic/files/29226807596.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/46d1gmkhdu51lm0fi35a95ri5r/53992632282.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/remimog.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/pabovaxozozekasoruw.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f99ef73024---7057266489.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130b010ef937---mazazet.pdfIn PDF document text
    • http://heizler.hu/files/file/jegoxipiladexulefugufowe.pdfIn PDF document text
    • http://nagakuratrading.com/js/upload/files/17250767464.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/5774507179.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/kewuvalalero.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130140b7e192---49323558868.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/gizefubukuguwa.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/28477786198.pdfIn PDF document text
    • http://thietbiytedaibao.com/media/files/28620330332.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/47446781892.pdfIn PDF document text
    • http://hangnhatbanonline.com/upload/files/52609105036.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210913_6762D6C74D0EA2D2.pdfIn PDF document text
    • http://mc-opony.pl/files/file/57003549121.pdfIn PDF document text
    • http://jeykrishnaclub.com/images/file/jowametugegaxalunugefefa.pdfIn PDF document text
    • https://aurorabersinar2.com/contents/files/99770790891.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/falimod.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/pidejujirat.pdfIn PDF document text
    • 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_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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