Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ae766b02c7fe2b…

MALICIOUS

PDF

88.5 KB Created: 2021-09-18 19:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2075ada22a9f9791a3928ca55226f574 SHA-1: e572124bd2d42181df4956a76edf6a488c90a6aa SHA-256: a3ae766b02c7fe2b5a9a27d727e3929ca1cf2950b4883d0ce5699f17ab0a3813
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://royal-art.pl/uploads/userfiles/files/varofifutepanopadavog.pdf In PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613edd196dde8---1028261597.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/49414273145.pdfIn PDF document text
    • http://fazendasaojudastadeu.net/fotosempresa/files/28220746018.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/kazapefiwoj.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xogebudifosisekeve.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/kenonusifavotoxa.pdfIn PDF document text
    • https://tadimtursu.com/image/files/21190705214.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/gf4qaanhj8m2aam9jr29plev03/18156068446.pdfIn PDF document text
    • http://rs-entp.com/upload/file/fotigonuxewidil.pdfIn PDF document text
    • http://azizavacanze.com/userfiles/files/90937993332.pdfIn PDF document text
    • https://gdwtechnology.com/fckeditor/file/In PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/94a2ca39f5ebd06c338fcbfa054166c6/xifojiw.pdfIn PDF document text
    • http://texmet.pl/userimages/file/mibawesoz.pdfIn PDF document text
    • https://fptica.ru/images/file/18401994132.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/kipemuzuderoj.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/46955094334.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/27494027154.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/87489617381.pdfIn PDF document text
    • http://santiagoporter.com/js/ckfinder/core/connector/php/files/sejoxivogomagiminodobe.pdfIn PDF document text
    • http://spartapr.com/images/upload/file/70247995105.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/bajalozidutopuwog.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/rojoziwulikimuridotozudu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=gabbar+is+back+full+movie+free+online+watchPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 17748 bytes
SHA-256: 2a69fb1ae54a2d3b20f1b91c8507aa14fd3bf322ddd8b247a0998698a38837b2
font_01_sfnt_off0001229b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229B 11124 bytes
SHA-256: 98d2eab9a8c7bec4dec64a029b5827e293a4d59e407e29bdee459a5d841b3981
font_02_sfnt_off00013c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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