Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff4c1100e08940b…

MALICIOUS

PDF

44.2 KB Created: 2021-07-17 10:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0418ee2487a9171730886449088a1497 SHA-1: 2e262343af0c6f2693524c427bc6150b98cf4514 SHA-256: 1ff4c1100e08940bda848ac189eed65c408f0124cd42c163a09d1a79e1bb68e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to compromised WordPress sites, acting as a link farm to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7749

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://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b5c308204a67caa84e7a72f533d35e37/folalaginevoxugedutula.pdf In PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/eaa32fa839d9199a1d6f861f92b75a17/supaveb.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/da5f780a01394e800bcaadc05b03f34e/nifadepirupodekavisogiku.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/2228847518.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2366334a94---ralagugavoxobugakupavabat.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62c62d7b00---gotumegal.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/ji21crbpfnvg7mb2lc9lhpfp1g/mobakogajelororawis.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609492d8ab36a---neduda.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609edb7ec388f---48854367329.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/fepijakizijorugotakujoni.pdfIn PDF document text
    • https://badrivishal.com/media/sosafukujosabepotaz.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608338559978b---60698884785.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fitamumow.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/roloji.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/96309602308.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/afe5ce4ef5e552f66f2c55d5752d7033/40539089639.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/titonozuvezifigok.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/fizajumu.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/lututul.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/rafukidikomi.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/a6ae3f5a85281efe578c58f7e8fc911e/bifenatejofukok.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/eu43gq75jgs31i37senugjih4n/84195143088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+remove+lock+from+a+pdf+filePDF link annotation

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