Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d319876bea865d…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 04:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1723fdf1c6e55f0f5442634306e50c6e SHA-1: fd54a61d6754643fd0d835dfb2165d0a38cf91f9 SHA-256: e0d319876bea865ddf7b9d07e01b08d6ddbc61c558af7fa87e5c2cf8e8e0cabe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5901

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://alixdemassy.fr/userfiles/file/wiwoteba.pdf In PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edacb920fc---38745542846.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160908cfb289f1---11162168723.pdfIn PDF document text
    • http://sun-tes.ru/files/file/68359732671.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/ie3ti2do01nrt5hsvhq8s1ccab/guzazeveleruxelexelati.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609003d7eed37---giwenibilelojigabipopet.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849b70db83f---fuwosejimumafopum.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/8vicbf62fpici4oudrfj0p6v03/vitonaroxuvefan.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b53a745b3---minumazopekuxivon.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16075e785cd8b9---nududali.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/ruzadobiwe.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a534ab34993---82937586319.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/28631274498.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb33b68ae---foxodumotivu.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d8a916edcb274d12e677860f3c35228f/66100512956.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/rojixelabemobo.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/39533603147.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/187d06e57955fb49cd5962de1d58def6/ruremujabafexexonuveve.pdfIn PDF document text
    • http://monroehighwildcats.com/clients/40160/File/zakezer.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160d7967e3e531---wiluk.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38e2467860---dupofebut.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4a4ecd867---96309892102.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b54bb2e5226---tijogezuzab.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160d3fda4da27a---76131001771.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/81181623908.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=appeal+to+authority+commercialsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11876 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13088 16876 bytes
SHA-256: 3d199857f07fbd0c175a18a610024b5853b30349f50fbfd3321f66094acb91c8

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