Malicious PDF — malware analysis report

Static analysis result for SHA-256 084980b1d4e1c875…

MALICIOUS

PDF

70.7 KB Created: 2021-06-30 01:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a8aeb758d93637daf92dfe53bd3d4708 SHA-1: ec74ad506d1b7a8975c27adc356cf455d6684f4c SHA-256: 084980b1d4e1c87541939b2e4ceecf8f0ff9447eda49da759fcf515c7e93996d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a PDF phishing trojan by ClamAV. It contains numerous links, many pointing to compromised CMS uploads and link farms, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated, but the presence of external URIs and link farm heuristics indicates a phishing or redirection attempt, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4988

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.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/6e6r335f536g22pv67eb7um75b/kavadikatetoxomega.pdf In PDF document text
    • http://gramercygrand.ru/files/file/zozir.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ae119748a8fe2e2431d95f72489509dc/rujosozakid.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6067137575.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/08e9fad72a64b152936ac106089c54a7/1000722454.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/nuriwojidalobetusofave.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/acb239d0fd39e372722eb0bb2bee767c/18207739498.pdfIn PDF document text
    • http://zahradysnapady.cz/soubory/files/13642393115.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/duzonitexuxuguto.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/52f6170064abe78f4b39a009b14180a0/11223604074.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/lidujeresodome.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073a65ed4f12---76091364036.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/gadamagugez.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf170abaa66---damifazonuv.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/kagowida.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083da3525b8f---mowobijapij.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/30739e76f650f70b6a283f988b65e774/12583537817.pdfIn PDF document text
    • http://www.houstonorientalrug.com/ckfinder/userfiles/files/33815713957.pdfIn PDF document text
    • http://allycatering.com/userfiles/82982908977.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/cmmo12t0n286rkk3k0ae9cjp1j/tafipelakegogisexedekiz.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/28c1cdf48dbd023e5555b5e08526a07b/10104423269.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//koxewafigategebanos.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/fffe02156120b4be574a5ed43d8eb5da/90369697528.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=performance+appraisal+form+sample+answersPDF link annotation

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