Malicious PDF — malware analysis report

Static analysis result for SHA-256 495d0845accb6c95…

MALICIOUS

PDF

48.4 KB Created: 2021-09-11 21:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 80957b5b5e0a5c67095cf644ee983717 SHA-1: 0119d3b5d89c57c81118b36ba427daae60cb5594 SHA-256: 495d0845accb6c95399976a1041e6c58cf4c9e909b22f8172f64f2ba2b65efcf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to potentially compromised websites and disposable hosting, characteristic of a link farm used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6605

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 http://www.toptehnik.si/images/bokanasuwiloparijeluwa.pdf In PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/195d2a3ed64c9ea7fd7ab4bf8f1d2641/66666796127.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/99362960630.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/92682097442.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/85262852115.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/mitinemawej.pdfIn PDF document text
    • https://parc-hotel.info/file/lutinapixosufim.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202192_42957_678.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/pokijetujibaso.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210902084645_1281584502.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/96168838533.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350309c2ed5---92619391697.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/scivj5levffisg2r5g79vubof7/34673179745.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/21282280968.pdfIn PDF document text
    • https://reniuved.it/file/17150772546.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/rizinugurito.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613156444b9c7---fofugeberemurejajag.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/lawelevutovule.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/kazenat.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/846i2mjahsjnrieklj6muj3m2b/72827009032.pdfIn PDF document text
    • http://scsytech.com/upload/files/68748189822.pdfIn PDF document text
    • http://kleinschadenexpert.com/userfiles/file/zixara.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/paroses.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/xamafofojadazefofuvijig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=can+iphone+bluetooth+to+androidPDF link annotation

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