Malicious PDF — malware analysis report

Static analysis result for SHA-256 80afacbbd20003a0…

MALICIOUS

PDF

74.6 KB Created: 2021-09-02 00:46:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1de75cc964366677fffd2f83b1cc2e6f SHA-1: a311fc183f4c8ee40935b6286789a836e7c3da7f SHA-256: 80afacbbd20003a06944964ce3705726158a58fb54b7ebf81495d6fa219d0ff5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://pixomot.ru/uplcv?utm_term=30+minute+yoga+sequence PDF link annotation
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/2n8h81oi5p18pt26ge44i154u3/7109964482.pdfIn PDF document text
    • http://candientushinko.com/images/file/92171097018.pdfIn PDF document text
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/b99dde2a88f341d292a361116beb22df/pagoxoz.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/6767277135.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/49570897958.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a958b53bc---51034055827.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607577d9b96e2---nuluruv.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f850432ed5---bipof.pdfIn PDF document text
    • http://hzbaoyan.com/images/upload/File/dewilimuj.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/b25a98968152004e9c00af7a10153dae/viwusegegumuxuvikiwu.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/xebezuwoxepeg.pdfIn PDF document text
    • http://chaplains-camps.org/upload_picture/file/51068747833.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/1670d53f9b16ad82bd4a6d23f2d8f594/dupukewul.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af96ff50bd3---wemijarokavuju.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/83984001122.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/85f666c12d7358a328c24e5cab469dd5/fafixedekoperola.pdfIn PDF document text
    • http://yanartextil.com/firma/files/76217921613.pdfIn PDF document text
    • http://emusicmarket.com/upfile/board/files/14261841651.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5586f227---46990944404.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073e595c4722---86554949374.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875634b67c3---kesegubixomopanopidur.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/nefekejolo.pdfIn PDF document text
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/17230938919.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/paketu.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/rizis.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/67316325005.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608141deec87a---53245243890.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_off0000c4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 10984 bytes
SHA-256: 22d84e60e1f70813e9a17fbffbfca838dd7b77bdb2f37d9f902e13cf4419e8a1
font_02_sfnt_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 15148 bytes
SHA-256: 5c3ab54c288917e45562138059075257bdb43d65aa8bc0771f15f5f144a12d5e

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