Malicious PDF — malware analysis report

Static analysis result for SHA-256 289cd31222321889…

MALICIOUS

PDF

235.3 KB Created: 2021-07-01 16:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6e4aefc4faa49b91a845c6d1846360fc SHA-1: c241aacf188d3baf1764aa316b4557ac1b1ae39d SHA-256: 289cd31222321889d37be5b020bbf7c2de09bb737e2dc12470138bd053f8ce79
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, several of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of these links and the detection scores strongly suggest the PDF is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9728

Heuristics 5

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=except+a+man+be+born+of+water+and+spirit PDF link annotation
    • https://diaspoassur.com/wp-content/plugins/super-forms/uploads/php/files/cf4302ef783043a1851c72fd04421a0b/59187253822.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/k6sl5fsk70mj2ni8au5v29361r/juzolozifike.pdfIn PDF document text
    • http://berbun.com/user_img/file/91728789437.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/99441517700.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/rufuzalonagogijiset.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/51381226042.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1dbfd24be---59178952130.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/oxobikevidoradifeb.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/sopenuro.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/b252a1fe06e049f7a25b3696a950acf8/wizopokokufiwab.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ui771hi5tad5udqg3a5mt5gq7k/93302397133.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e42a0a1e9---75822774008.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e0571623e---12221091655.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d32c5c6c9---65893191035.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/1dg9bjo3in8n85l9g5sd6paapv/87044012485.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/d0600839ee7dd2d7db6ff9e9ef2d8bf8/balevavodaxuvepevonapol.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/7s5cr43ukfdd02ecqijam8i7p9/37820758774.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/rilum.pdfIn PDF document text
    • http://fygl.net/uploads/file/310255283169.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/70068793246.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/01190623609.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0dd944f43---57559340635.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160b0eabc44e2d---vuxazebelenuzapo.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bde1b1e18c---63646851772.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00030efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00032713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32713 11044 bytes
SHA-256: 89140d8eeb93cb085892129d6a22c2336cb6068cf9f47495d5fc5dc5d54b3bf3
font_02_sfnt_off0003409c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3409C 18392 bytes
SHA-256: 2c23c4cf4a107e0f085f1062e3b2137e34a463184c6dfca634a24b5c7c36d8bf
font_03_sfnt_off00035de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35DE9 30104 bytes
SHA-256: 3ee0d33ab288a2e21ce317594411e4260dcb8cb83337b74b1d1110f8fd19ab6c

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