Malicious PDF — malware analysis report

Static analysis result for SHA-256 9484ac5d116c471f…

MALICIOUS

PDF

90.8 KB Created: 2021-07-17 09:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d187cd02986447aa754a28cb383bd268 SHA-1: f01fe0559d6971d66146f54c83bd2d4997a84383 SHA-256: 9484ac5d116c471fb907346569d85c1edab9360798c719852a03dbf95b57ca00
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs and link farms points towards a tactic of redirecting users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/62ec898988a8ba4c5d98aaf362a53823/vamujopukelibawifofuginig.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cb5e45de3---77498355713.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/qlti7higkbdn46fvo6ogf5ne11/mugajuziwiwuzalefavoloje.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/85515159004.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/a3ebd57b4beea8c3e026d6c7855760a4/jiwokinerovi.pdf
    • http://munnarinfo.in/userfiles/file/wunobisejarumuwotoligo.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa63e4321d---jarumidaganutofatofelav.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2d0f436fd---zodosu.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/fb7aa48fdac23bffeb3a1c1694d91971/81665446591.pdf
    • http://csc021.com/userfiles/file/20210626064730_jwdagr.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160915b13a4137---remub.pdf
    • http://fantalife.nl/userfiles/file/sidiramenegepeforo.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885b72392a9---tetiwekosuwiv.pdf
    • https://dovolena-jiznicechy.cz/uploads/93584696443.pdf
    • http://bakkervoorwinde.nl/app/webroot/files/ckeditor_files/files/dotadopinevu.pdf
    • http://skipjackpoke.com/ckfinder/userfiles/files/47430375742.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b251647898---86310286332.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d97a188cf7---83547763052.pdf
    • http://czdashan.cn/uploadfile/file/2021051319233273499.pdf
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608571f530bbe---ronujekoxu.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/iqf1be6iqsasmopqh92qf20bu1/mapogukefefid.pdf
    • http://reguitti-engineering.it/userfiles/files/66108249952.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160716d8965be3---90478423257.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9158143f01---roxolidupizazogadusigaf.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=dog+with+small+eyes
    • 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_off00010123.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 16792 bytes
font_01_sfnt_off0001193a.bin
5662da60cb15e34207f4c32b1d0f14da9d1f4dab961a2c5e6eb4b82e8492cbbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1193A 10552 bytes
font_02_sfnt_off00013165.bin
1e20658faa6f92a17d68bdbe3b9127036e5980e7c0e30094007120bea556c8e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13165 16712 bytes

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