Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d361cb18407f490…

MALICIOUS

PDF

85.5 KB Created: 2021-06-27 06:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2d1c6200a12f8dfbcd9448b7d93abb36 SHA-1: 18964c03726d667cafcc14f683543c12ba1509c8 SHA-256: 0d361cb18407f490e356d98a4660b18dc4af72d0e59e88da5cb5d980f5c61de7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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
  • 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://drafthe.ru/uplcv?utm_term=there+will+be+a+falling+away+from+the+church PDF link annotation
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/ff54a998944ddd0c1628de8cf045e201/90103914690.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/kugofakulonegonifitex.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/11c17880ed2a6a15a75ae1496f2f9eba/70798060142.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24ab5d9f99---lunozebujavokeze.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/susemotafi.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/gdntn2r0ghggnvjmiqso4f28qf/zizugokugejesub.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/kabemugegugedipivogukonot.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/mozujelikixugakigi.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/4k1uqnljoggra2m3hiael69007/varij.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9e76921f2---femufavagupuzogini.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/3rphobkl45tj274ban4ffct1o5/16032008243.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/ririgixepa.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/61dbd1bde87ae92f09c93422400cfe3d/13785051303.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bceb93a155f---81078512504.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b320a79c26c---62676290620.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/derisagavipineg.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210624052813.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/5m0es2oj6v5jgkmbo3nv9g1ahf/bitipebusofeperajorubo.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/belerewilemesuxojuge.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/vewikumes.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/98320137852.pdfIn PDF document text
    • 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_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 11020 bytes
SHA-256: 18501d5bbf5861d1015a78be4a49a1a576140aa1e39f07306785b6106fd88a54
font_02_sfnt_off00011d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D57 16656 bytes
SHA-256: 67c93b6ff9eef380de09fd1672a270fc1e2b951b970fce8f0031077b37a58761

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