Malicious PDF — malware analysis report

Static analysis result for SHA-256 375c55086c615346…

MALICIOUS

PDF

45.6 KB Created: 2021-09-07 03:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: eb852afd42f1cafce1075cba6853729c SHA-1: 1bf7995d0b9b6071bc6f99546686a6dcf4e75f1e SHA-256: 375c55086c615346c2952c957a5deb9dac113136def4b3ab2e0bf7f9f71a6b4d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery through these redirects. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8799

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://dodomacnosti.net/data/file/18762348790.pdf In PDF document text
    • http://orem.mn/uploads/files/jawaziburewofu.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160cecd78f0e5c---xagexusizeveripuxisumusu.pdfIn PDF document text
    • http://expresskaliski.info/file/38930723905.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df28e1df7e---vopifer.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/48498436862.pdfIn PDF document text
    • http://skupka23.ru/upload/m/lopusaratokugaxon.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160855e8e378e3---47974395451.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1000b1049---67640417835.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/kegixiduvugakusigorog.pdfIn PDF document text
    • https://icbacademy.com/upload/files/92385508953.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/c74090e1bb6053477c80a110f0bbdc51/mevurenivomemaveribex.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/milerenobebukimi.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/konomofulis.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/gopevomofixeja.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bc7b758e1---wamukewuzufujo.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/37c5b1062fa6097976d7234756a9d722/tutomazubijutofapevanu.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/e1d5e80275e0ef133ade423819b57e3c/77007747770.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/60985135419.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/nekogugu.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/xagabexutumozesesivided.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/misitanuzarizaruwitu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ospf+protocol+pdf+ciscoPDF link annotation

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