Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9b09e3154fb1ea…

MALICIOUS

PDF

90.4 KB Created: 2021-06-28 02:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b9669108288339a38c95def069e85bdd SHA-1: 1a9b7582310812572ec119e49e85ab678a42d0f5 SHA-256: 6a9b09e3154fb1ea6d10876c5ad663910e8d4e55c893b63783d55e332997dcdf
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution lure. The heuristic 'SE_INVOICE_LURE' indicates a potential payment scam, while the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings confirm its malicious nature. No scripts were extracted, but the presence of numerous URLs indicates a likely attempt to redirect the user to a malicious site for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bc7c9b46d---sajibesawumisuxeti.pdf In PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/da79bf288bec4243dd7578a64fb967e2/lirimat.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/60331107109.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/52072911452.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/ponawegarita.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/4761bbc3036beee3617938440f3724b6/powakejunazenima.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021060315485273499.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/677b06104272c6797b505b25707c0baa/91447732796.pdfIn PDF document text
    • http://vce34.ru/attachments/file/92373699555.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160990f1e53869---mexiropin.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/faniwaforidasawubetaka.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/duwatifixexemunabu.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/ruxovisituf.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/4cd7b865efec60342a7ae4307209547d/49873620641.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a182bf3c3b5---wutunixitemixu.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/21889537319.pdfIn PDF document text
    • http://olympusflights.com/files/files/60721328295.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607362b227dd4---17171839375.pdfIn PDF document text
    • https://hgb.se/filer/file/74704463291.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa52cd63c40---gezanimazoruka.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/uv1dqb4v8b791geq13hm5g6j94/zipixemebezow.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/c63137a246764fc12adb98f9daee7480/vufovifogig.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/5d541d80e0ff670b6f52f03d5d5a4b0a/59269547290.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/feziduxawejo.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608238d34e965---vurosopoxenig.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/ddf93db2ad11fd6255d23495a572dc03/pobebilapata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=scholarship+books+for+class+8+2021+pdf+download+marathiPDF 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_off0000f993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF993 17760 bytes
SHA-256: c9ca482ac375694ffc17fc299293ee7094b9791ff5361eae7c7a8184802f83d6
font_01_sfnt_off000127ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FF 11648 bytes
SHA-256: 6698f5cee299a9428106d4ff87145e13aeae7c28eb36115c152487f343569b8b
font_02_sfnt_off00014364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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