Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc29233d4bbee711…

MALICIOUS

PDF

84.6 KB Created: 2021-09-07 02:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 2ce1bb5e365579d763d05fee497fbefc SHA-1: d00be7910729a06e2057999923c320aa6ea864e1 SHA-256: fc29233d4bbee711eda99aa6939ae6fc0b2e3c7d4cf4514f10313d93f092122a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crysiq.ru/uplcv?utm_term=stenosis+ani+adalah+pdf PDF link annotation
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e6ac84a014693f19a796e6099c0e9f43/40387075631.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c87de3e62e2---91246831758.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/50352040324.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d7df6a882---sonubadetegowokoke.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/jufexeram.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/9ujbtueqf0qncg6gl3iqaugc4b/zarujubufisezu.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbce40ab97---satepepuporununuxi.pdfIn PDF document text
    • https://landbar.com/upload/files/60781051599.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/48a409a72c2d224c2aa252944ac595b1/tiledotulazedidesotikub.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210818_634E4FF806B0BD82.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/6q1r1969chshm2t33b10a9qfk6/risirizib.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/q4kg27oj1lsjdbepj50k4lnaom/nejisufijaloxorenurawur.pdfIn PDF document text
    • http://dgjst.com/upfile/file/2540645039.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/lakerikakuni.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/safunabefapijufusu.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/f1a3383039bc2d813fc3e773e3104e94/xebevoribizasinem.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210611033309_yfz6dw.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/gapilivobexizesatukesero.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/zewotokefimene.pdfIn PDF document text
    • https://personnelcle.com/userfiles/file/gofedemofenaxagu.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf5add213a---57064557177.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/c5dec6eb8947e1dc990f4a26dae51494/81946028863.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/53e04f74d7fdde4c300744122008ccc0/nedexir.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_off0000e730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE730 10568 bytes
SHA-256: ce0379d384bdf3bf40919934e2393ff06f0dad47a97afff28dce83d1f0561f14
font_01_sfnt_off0000ff2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2B 17500 bytes
SHA-256: 02166bfc3f6b5c5c4e0db6578740210e879cd6eeac7d08300f94e5cf85d10340
font_02_sfnt_off00012c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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