Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d1ff9297418fd0…

MALICIOUS

PDF

93.5 KB Created: 2021-07-07 15:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 060f2b6ee8bff85a70a63ed63056c3fb SHA-1: 9753d3600480b512d0c18c8be8267622fcf62a59 SHA-256: f6d1ff9297418fd0a11878edcf167d8e4797d90896f2a9f5f1b05e9bcd1f86e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous distinct hosts, many of which are compromised WordPress upload storage or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://champagne-marc-chauvet.com/images/files/tetobafuxegawajute.pdf In PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/3e4952ab71d02c2453e472c9915c5c9a/sapebuvutosovikodasenuri.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/vibovewex.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a75071d56bd---88116140025.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/252121183026.pdfIn PDF document text
    • http://charivne.info/images/file/88550662050.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607d054502400---42365060433.pdfIn PDF document text
    • https://i3mit.com/shopadmin/upload/files/vibixuvep.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/puxuzuzimive.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ca408c7f1---wirago.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/375cb0213b3c1d12c85304c7ae87a37e/tusodek.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c991d730cea6660e155b91fd7893f8db/kimigalelunakapilafapesa.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606effea2bc3c---suziwowijuzepojidipada.pdfIn PDF document text
    • http://kfbi.ru/content/file/wijijovonuvebagelu.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be65eec1831---zutafexutupimafatitoreze.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/32171061779.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/rakulewijibonuxolafo.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/mopula.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/f5vfkompf0eip0mfeaegkkf343/sabujamigemoduf.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/vafezakomuvebe.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/74783348257.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/84768058018.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=doctor+white+cake+mixPDF 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_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_01_sfnt_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 17980 bytes
SHA-256: e7aa97dc720e60579e116b96a38fe29a4ab3cda14d27f503e93ec611eb86cfe7
font_03_sfnt_off00014f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F42 10456 bytes
SHA-256: efce03365eba6ed308485cb0b5d5fbeab27b60ea4890442415bc6d354c3a9de5

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