Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5b2f6028ca1313…

MALICIOUS

PDF

43.1 KB Created: 2021-09-23 14:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7ab534f5d7c78bd1da5a0ed9a85c0c7f SHA-1: c4332db787e84a51aae7978ac929425daa4bb54f SHA-256: ff5b2f6028ca13130634ab7e8450e7de22b73bca87ada0291eacca3681335023
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. The presence of these links, combined with the PDF's structure, indicates an attempt to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7814

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://mayersoffice.com/userfiles/file/kipiz.pdf In PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/1b0018988590259cc57910462fa1f670/reberoleburape.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/ganilogifinakan.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/40721639657.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/17325489043.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/5233911925.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/fapepagorerufiko.pdfIn PDF document text
    • http://finalbrand.cz/upload/file/23848853446.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/nifipigemisevirutotu.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/kenerotukigegeborewi.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210906012225.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gb9d2a6j6k0u23lqu45qovldm4/5942831602.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/56316281603.pdfIn PDF document text
    • https://memo-log.com/userfiles/file/dobopunovusikomo.pdfIn PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/donunasasodej.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109221303503995.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/494c331296980f950aaa7787f2ce7610/wuwem.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/68a333a7aedf19fad3bc1e6beec15a46/51813780926.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/78064147884.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/63817441708.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/kupib.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/45172868383.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=zombie+roadkill+hack+apk+unlimited+moneyPDF link annotation

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