Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95ac727edcba552…

MALICIOUS

PDF

57.4 KB Created: 2021-07-22 15:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c054305d974927f4d0a5a43eadbd019 SHA-1: 96f87d38c8f2d2429800a610b28a0963a7aeddbf SHA-256: d95ac727edcba5521df7ea1e7b31185464982b9ddedadeebfa765950f701cc4e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, some of which are hosted on compromised WordPress sites. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions, while the link farm serves to obscure the ultimate destination and potentially spread the malicious content across various domains. The presence of these elements strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bisnismedsos.com/userfiles/file/bugolopegujatogimeb.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/1dd77d8d1874b7d3731a0fdd6a5381d5/xotawobodegev.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfcdb256cf---wujibarenak.pdf
    • http://aceonlinementors.com/userfiles/file/dilegofamuxogoniloles.pdf
    • https://sieuthimayphat.com/ckfinder/userfiles/files/duzulekix.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23c831bcf0---30537678832.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d9066611511---44528025943.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0974ef18b91e594d58abd7e60bc4e35b/87512955251.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/jd865i7b4k1lvek00jdoho7guh/58659483205.pdf
    • https://i-chat.tw/js/ckfinder/userfiles/files/gazilefimuxodatijonun.pdf
    • http://luberoff.com/userfiles/file/ruzotadela.pdf
    • http://hrjok.com/uploadfile/file/59420014117.pdf
    • http://safiorida.nl/operatori/userfiles/file/52725811954.pdf
    • http://emaaravm.net/upload/files/wodaweliw.pdf
    • https://codecs.roimages/file/faxagipowamarepugonir.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/51e8bc4181470faa61798ea83032e96d/faguzukegudo.pdf
    • https://keluargamimpi.com/contents//files/22381621690.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/909a93aba7adcb9689d725da2b07710c/1543533690.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ets2+mobile+online+android

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