Malicious PDF — malware analysis report

Static analysis result for SHA-256 902086447b3ba529…

MALICIOUS

PDF

93.6 KB Created: 2021-06-25 21:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57bae5d141f712b03d32c0678a616d2c SHA-1: 27d07a47c7ac091c413527a69072874a8d33ea69 SHA-256: 902086447b3ba5296f9c3ef6532a44eafc4c63f0f013ed2faa3158bde79c5883
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress installations. This suggests the document is designed to act as a link farm, potentially leading users to phishing sites or further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160992789b5d78---95413239342.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aab090ecd0b---37034828149.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/sapojetowo.pdf
    • http://sbox-technology.com/upload/datoteke/vifuparogipuna.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/3ec5f019892b1aa70da5b602bc5bd813/xafuvifikekimelajewa.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0518a6da9---doforozo.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae90b94797---nobumegupatulo.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609469ade0a70---biduterepazomemituj.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c2635016e0d---geninawotoxirovagodo.pdf
    • https://uniontend.com/userfiles/files/loraboludixadaxexajela.pdf
    • http://bebelino.ru/userfiles/file/5007105099.pdf
    • http://netinflux.net/userfiles/file/garimupoxek.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd223a962a---14997216411.pdf
    • https://basisnomor.com/contents//files/23917495505.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66b54aa0ab---37401759391.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/2dnkvloomng08vqka7sgue588f/letubejoposawuxojawutuja.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160773c960cf1e---judomijidawizumosabip.pdf
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/karoz.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079292925d98---powasa.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e46441352e---89787029599.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/956f446446363e71081fe61c4c174439/39002391591.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/5df868e63be85471144bc086c9d64366/2965002483.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=words+that+start+with+the+letter+c+for+kindergarten
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/a4cce7031c27b7c54c415cf8ff4d5b51/potid.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ab1.bin
a2667a002d74c82e89040bfd60eb3ddbb08a20992f996ab1eeed66a6fee07f3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 10924 bytes
font_01_sfnt_off000123cb.bin
2d69de485bd63bf855aeed5af36613443c95c804dd97ef1069c55f9d1ab11df8
pdf-font-stream PDF embedded font (sfnt) at offset 0x123CB 17324 bytes
font_02_sfnt_off000150c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x150C9 16792 bytes