Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf6a1b9efe95a8e…

MALICIOUS

PDF

76.1 KB Created: 2021-09-20 03:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3f84335816605300ccbbae17802c5d15 SHA-1: 5598de67f7995af1ac37c4907af84c131a2620b3 SHA-256: 2bf6a1b9efe95a8e88760412b16648713515cd1d2a931d0f0c41d00e02badbe6
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. Heuristics identified it as a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an effort to obscure the ultimate destination of the malicious links. The embedded URLs are likely part of a campaign to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

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.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb188137be---28693226017.pdf In PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210920_8D7C69032F193CA4.pdfIn PDF document text
    • http://domario.ru/userfiles/file/47961328485.pdfIn PDF document text
    • http://sung1.com/upload/files/kaxig.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/21626161939.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/bazugoxudonemi.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50187575303.pdfIn PDF document text
    • http://hzxf.com/images/upload/File/nidazuxesuveloxudufozasis.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/19470407289.pdfIn PDF document text
    • https://jck.ro/userfiles/file/42875653599.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/wuxutuxodadure.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/kf6olg4pmdkivnmohrs7fsr3c7/fizafivawewifuvokowa.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/wusakoregepupofedezur.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/58611341489.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/g2revi41ura66lcmtis4tefm6q/gadodematafawapimafokara.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/14924641801.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/70359226699.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebeadccd17---berez.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/87944072012.pdfIn PDF document text
    • https://ivanamihic.com/files/23305604226.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/34213631413.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210918025826.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/zerusozotuzajalejevipug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+hardest+game+onlinePDF 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_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 18100 bytes
SHA-256: a897384bc25711bbc2232719f0f32bb7c6961363f313eae8a85e4e2dbc2707f5