Malicious PDF — malware analysis report

Static analysis result for SHA-256 4822f57efdff1b6c…

MALICIOUS

PDF

55.8 KB Created: 2021-09-02 22:22:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4c9df0608029986c791fcd643070f4b9 SHA-1: 6270d076e53319af2bb575b7d04425664e81090e SHA-256: 4822f57efdff1b6c4ccee0e93ecc35f392e0d7769db5f2110b9472ca478b24cb
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple external URLs, some hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL analysis point to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7420

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://unosms.us/userfiles/file/gepezeboxapurozibawod.pdf In PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/be0ae51a89894a3a5dc3c816b0513446/gosovagalugobogutododoz.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/9d8d638d21a1d448ea5c086493503deb/bidorumarajipixepedil.pdfIn PDF document text
    • http://poiskvod.ru/images/file/16329540525.pdfIn PDF document text
    • http://kuzfarm.ru/images/file/wugirukalemuma.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/widopixoli.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609243f7bcbd2---66378224642.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/e9fdg5is692l3i0co9tkib1k01/29844895502.pdfIn PDF document text
    • http://primehorseproperty.com/userfiles/files/75810963703.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a31b681d7---23908591025.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/p717ss2ofsatn1pakqq3smfua8/37103842876.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/zigov.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/64183773870.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b5ffbd44d---kurabus.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/1002c87071075ccc38dc009261fe60eb/50113364326.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/likemudafivaba.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/75314244646.pdfIn PDF document text
    • http://pneusmarene.it/images/file/13592039832.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/foxakowuzumu.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/a435e36fe2c015cd80265256da360b0d/lonufilab.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610051c8099a2---norejagegakab.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/0ff6b22881b13729e5a2db1281e110f4/12015319068.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/madotavojon.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/nelofesipofibibakokute.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160fbd8d1cfd1c---74101926882.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/9h6s5lv0e4vo7slbaucp4qps1k/98461460163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=solidcam+imachining+pdfPDF link annotation

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