Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c0b26d1f064d0a…

MALICIOUS

PDF

88.6 KB Created: 2021-08-31 08:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6cfa856f9c0ca76d97d0fadf1e013163 SHA-1: 9484c8adb9bc93afc55e44ca17a76af58977e58d SHA-256: e5c0b26d1f064d0ac7fbc8e4ce1593252a1bffa617d5b92eae3f948dcb924879
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://oniceh.ru/uplcv?utm_term=blue+ringed+octopus+treatment PDF link annotation
    • http://lapenya.cat/imgjovesnaves/file/gosokitatakavafim.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba03cdb3afb---lopesajudogedet.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/gomidilukexufiduzojirufe.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/rurobifizalidadonow.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608844f426a6c---mevijus.pdfIn PDF document text
    • http://edumedcare.pl/upload/files/gizezovixujo.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/36985170292.pdfIn PDF document text
    • https://xn--80aggmy8c6c.net/UserFiles/File/11336637573.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/9f8c0b364ae5dfe2fec51d8ef3dbc060/mameva.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/jufokogepuwoxikurewep.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/1laghak8ir0ijeqisno3jtju9f/88589376442.pdfIn PDF document text
    • http://dhf-china.com/d/files/somofimapisolekofa.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/xotirujajumet.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607237079fa7c---13297255843.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/seterenitenuz.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f4b515c33---87579959119.pdfIn PDF document text
    • http://ciskmv.com/css/file/82412992887.pdfIn PDF document text
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/jeboraluzado.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/95d75553712558e678d7ad67f450e1a2/63395343809.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/62295155174.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210720_990D9ED84614133C.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ee857e53b08---60886883364.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_off0000f1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 18732 bytes
SHA-256: 029b35e2a0a34099d4b4376df4b1256fdc73a85bef8e2a6b28705714bb2ff57a
font_01_sfnt_off00012361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12361 11012 bytes
SHA-256: b05c9e584109d609fe68a84340016c457b1a5c4c6ec21c0d7a7b0661cb57f51f
font_02_sfnt_off00013cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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