Malicious PDF — malware analysis report

Static analysis result for SHA-256 9936172cb99b6c9e…

MALICIOUS

PDF

62.4 KB Created: 2021-09-17 23:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d403c5a3d547a89e4263901e430f765e SHA-1: 1921d14a6a26d5c595e8db7b4039b4914a8cc066 SHA-256: 9936172cb99b6c9e38da78adab4ddcbd0e97c769d687e6e453f6995d1ff981ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised websites or disposable hosting, with one URL specifically mentioning 'tiktok apk download', suggesting a lure for potentially unwanted or malicious software. The presence of embedded URLs and the nature of the links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8923

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://nomylo.ru/uplcv?utm_term=tiktok+apk+download PDF link annotation
    • https://esperanzadeavila.com/fotos/file/26149536629.pdfIn PDF document text
    • https://flyags.com/editorResources/file///23277102926.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/28023735914.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/55690846237.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/pojivojazuxanodunogurur.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/liwasuxobakori.pdfIn PDF document text
    • http://silver1979.com/upload/file/7723517035.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/tomimixa.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/87991827792.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/nluknisp3nl7svsrvg12fcv4s1/benutixowupuse.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/95060481343.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161309a450ab58---nenudanemowedaxo.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/jinodaka.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/tunuwugutedavidokeju.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/kizixinoledupa.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/fakulikebulikizude.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/40345525009.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/8581619580.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4e083e82c---16591562999.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/karekiwovusaro.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210906215513.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/pafujopazu.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/4e7cfbc56f070cca6c87ae62e99a8d50/mepoviko.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/nixumulikekodanuxo.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/64469572266.pdfIn PDF document text

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