Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbabb415c470e8c…

MALICIOUS

PDF

41.4 KB Created: 2021-08-02 06:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7e96a396448e69c98296155b96acc02c SHA-1: 9aad166db45db1ab9b2e82cae2f28ef62bfc292f SHA-256: ccbabb415c470e8c97959bbed5e9dfbe4f02b3718542760ac295b9b656590efd
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit users through deceptive links, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9490

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crysiq.ru/uplcv?utm_term=problemas+de+regla+de+tres+compuesta+resueltos+pdf PDF link annotation
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/08c33b25e8035d7c0e43a1633bbaaf98/9536321859.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/duwoxalifus.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d983b0304f8---65862325684.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/56588856230.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/vezitus.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/42617417474.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/lurebav.pdfIn PDF document text
    • http://goneviaggi.com/themes/userfiles//files/24081042272.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f64fb7703---36923450288.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f63a715fce4---dojojowaw.pdfPDF link annotation
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160893a4874407---pafavevexi.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/80634198603.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210616_38D4BB4306CBE368.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/5ecfv0nrh1g2vchun539qq1rq9/10512674764.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/rijerupudoponujofu.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/86cf562eec6cf4b8634f26f1bc8e0f24/50696440668.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/tatuzedavigafod.pdfIn PDF document text

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