Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f1049921eef61c…

MALICIOUS

PDF

99.1 KB Created: 2021-08-07 18:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3efbb60967d70fd99d4bc9ef9294ee42 SHA-1: adc1b5f93d6eeecb329ce19c55af2f7abcfbd7a3 SHA-256: 75f1049921eef61cadfaad683158234f4a61436bc3c093ae6adc00e78c523298
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress uploads and other domains, suggesting an attempt to distribute malicious files or redirect users to phishing sites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f733c2875f6---rovorinugenasu.pdf In PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/munumoxedutojob.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/54031120001.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/dirigodisopu.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/1bsnvp8bgk72nc35fh2kkl25r5/lasinixufujarusi.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/ginarusafepewurigifudow.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/1410f890b58e171d03aa51af917d8659/94890577232.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/papinax.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/74286320071.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/35dpehhbi3t07gqet4k3s5jfr3/gawokulojobikiteminem.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/356d0fe416bedae5d2b566d9130b51bd/72217425251.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085303c191b8---zexezevobepabexuxeto.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/21067017167.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763c7fbd729---kegojolub.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/42202355057.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/49966331154.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/jijes.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/da1e38c882dcacf8a54f520d156361d6/renedekejakufevixaba.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/32810350608.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/kerupewalafoxotezi.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608807f8c7a92---jolivanazas.pdfIn PDF document text
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/608d2c97412176e858c99d73ce434a1f/wowunetedod.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/pekuz.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16096dfecb308e---nularilizuvajigudod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=download+real+racing+3+apk+data+unlimited+moneyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 16120 bytes
SHA-256: c4941421748b4419eca111dae89a1bf17d29676113d9f254ce2a47dac72774fa
font_01_sfnt_off000117b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B9 19176 bytes
SHA-256: 0305e2400f458068f7d4f27839133111610738ea21cc6d46a5982e1191c6a977
font_02_sfnt_off00014a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A4E 11252 bytes
SHA-256: 272acf5f4623cd1d1fe81cdb7f0fea103c3062ec519052a3e99fac65a2e2eeb3
font_03_sfnt_off00016495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16495 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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