Malicious PDF — malware analysis report

Static analysis result for SHA-256 86ee36587a2406ff…

MALICIOUS

PDF

67.9 KB Created: 2021-08-05 10:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ac1eedb279e6686ca87d6bd8f370572 SHA-1: c800dd4bcd6f8b831afeb0598b77e6571339f49e SHA-256: 86ee36587a2406fff2adbb0ee2cff95c88950982b628bc41ee9612f4f72b00d0
162 Risk Score

Malware Insights

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

The sample contains embedded JavaScript and numerous external URIs, including links to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation for client execution via the embedded JavaScript. The primary goal appears to be redirecting users to external sites, potentially to download further payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9758

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://crysiq.ru/uplcv?utm_term=why+isn%27t+my+bose+speaker+playing+music PDF link annotation
    • http://ccforum.kr/uploads/file/1624426597.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/vobuvirujurixezovidav.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/jufifixojunedawosewufatur.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/c188885342cdf8f9aa7df145bc4c3346/fefipojuwilefepuso.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/latigodinuxonaxunujokak.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/bepasamafudinogola.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/89902495141.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/f136eec90bfe8c860d0c0ee84de3d7d3/53722998379.pdfIn PDF document text
    • https://nexusmediation.nl/files/runetizokozidizuxide.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/26447967639.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/q8e0806mkq73072l9ffii4pkot/kiwodigevige.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/gofusifatawiwarivoj.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f139e2c3cc---vonuza.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160977a0c71fab---68641821257.pdfIn PDF document text
    • http://wdnederland.nl/file/46591114853.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/litidezibebej.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6cad810d8---xolovekudamikujulepa.pdfIn PDF document text
    • http://letresorellebio.it/userfiles/files/gosat.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/lurebosumot.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a885eb44b---36048434644.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/59631853323.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/20906734001.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8b6bf3e2a7b79f49b2402b8804feff9e/kokekogim.pdfIn PDF document text
    • http://congtydaihai.com/upload/files/dinisobogujovez.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/49806949848.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.