Malicious PDF — malware analysis report

Static analysis result for SHA-256 445f6511edfef1ad…

MALICIOUS

PDF

59.5 KB Created: 2021-07-02 14:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0f8756f975a63e814106f05e0bb628c2 SHA-1: e5cb335aeb90a545bda7a660a73de92ad27a546f SHA-256: 445f6511edfef1ad350e0614bc651778a884588013483564fe7fd7d2c729e320
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV, indicating it is likely a phishing or trojan distribution vehicle. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites, likely serving as staging grounds for further malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3715

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://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/adre0ri7tg82gilr77vv32s217/vomigafepubamip.pdf In PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079df824703e---zuxevoligivexuparijidi.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c273322e73---jemeduju.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd688bd174---66565824339.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210518024450_0x3d1m.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/vobizupunoretafeninixe.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e5ce3802f---buzupotokazapamifelodivuf.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/dulutenewuzujazimulo.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/naberililimuzaluletaza.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc6a8bc0d---88646249680.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4dc24fe95---nuzejigomodezejebimik.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/20158192042.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/bumezojadakojekemuvuvida.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/65d2e39f9d842a56e3581762c1a705e4/15230238751.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed0698b861---98376970664.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/47c163b6dda804660fc54a3e0110c751/94987199674.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3206d9c5b---favugozijusavubobaxewopit.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/komakaj.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/dd853fa57b77234f332a098eb64bb767/mimakaborejun.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202106/file/1624137417.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7b1d68f82---fubodofuvoxofa.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/tadaxoxusefu.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/vigibapo.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b21b2313c949f12731cc4a16d05c8cad/29516786951.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/8086db7f5e5dbc7adb1ea525206e0ce0/gomuvob.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/zanuzomij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tremors+in+your+bodyPDF link annotation

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