Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5418c053358b5bc…

MALICIOUS

PDF

55.8 KB Created: 2021-05-19 20:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dea430817075d01493e8cd83831918f SHA-1: d0e96f4800932d5c37d44f7486c3931aef193764 SHA-256: b5418c053358b5bc234c426ff95c0b0502fbd98b51bb8c30eef88631188623b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites, suggesting a link farm used for distributing malicious content. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9477

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://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/6915882dab75064a54db9900e0b6b89f/lazobava.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/6475138a62db6f07efc32fcfbf1c896d/tomop.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/03anasl804igq9mmcfboer6ibt/81275106163.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/111291326e272c57f1cac54645feea83/76588070124.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa72a3abad---baramatikefo.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a433d181c7---gajazuwezadala.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3bda1c930---65088943513.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/fasiz.pdf
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/a0342f47d7d23b71a3b6853a967e8f83/sefinidupo.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16095dc04d7146---xewibexavukimivolipe.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7e463ed8---parewamasolobuneviwotumaz.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/edccc23d82de53b552002e0c51e9c127/tunadogimazej.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096794c4d92c---bupasugeveboge.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc8099016c---zuzatufiza.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092323996788---nujejo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=safewatch+3000+installer+code

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