Malicious PDF — malware analysis report

Static analysis result for SHA-256 95859d1c73b3ae36…

MALICIOUS

PDF

62.3 KB Created: 2021-08-13 05:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cd41b9dfc37269849ec7ceecb03eaf1e SHA-1: db2a670495ad25998d31e354dbcf4f5a22094bec SHA-256: 95859d1c73b3ae3696a013be8dde7078ea7895bc350d954525d0e0bc70278ecb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9719

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://wastran.ru/uplcv?utm_term=euro+truck+simulator+2+android+mod+apk PDF link annotation
    • https://iword.de/userfiles/file/viroze.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/narode.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/66448687991.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b9b9c5bfd---kabolisafikemax.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/62694002675.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/giruvokanedorerapisi.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/nofawurafezivazamikiv.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/42655030875.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a44a07d28f---8992153382.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/33766198967.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/45084c39de3786bbb5347b351d5b7c49/48558910812.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807cf6c50a2---dejegojobotan.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/89664064539.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-07-19-11-01-35-tlgaPxWs.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/550730e6523fed5e6e747089d9d3503d/79793311667.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/n7urd9ci903paj9g77uhos1bds/65892291412.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c36ea03af---50925438485.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/xovalozewezosi.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/e8efc3b4fd07fce0c15f483e2719860e/38472136720.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/dulafebifodiwopewepoz.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c28c8e1cdc6---jatutunoxolavakotefa.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210528_AFFAC03AEB0B2611.pdfIn PDF document text

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