Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d860146c07db52…

MALICIOUS

PDF

74.7 KB Created: 2021-06-29 09:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fb434aa5f89433ca60a774f45f64fe19 SHA-1: 645694760c33692ea98fa96d77791520f03ef6d2 SHA-256: b0d860146c07db52380c0670013621e11193dc6456f3667ed0b5c6010760b63b
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, many hosted on compromised CMS uploads, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8c1e62ab9---didubudejawirikugog.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/bb6785ce8a1296b59b538fa028a0c2f4/jixaminilab.pdf
    • http://amon-syotengai.com/userfiles/file/mixunijeza.pdf
    • http://firstcuwire.com/file_media/file_image/file/15683488966.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/736b8d494a7aca4c8e8e4c38b90cee87/23722227721.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/amskiouqop3ro47att3ptu8sdt/rikoramutuduwe.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3e6d69529---50526096510.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07008a8ba---jekijamuxopobijeso.pdf
    • https://smilepaper.tw/archive/upload/files/95335812127.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/974497df64ef4f1f9daaf6c06b7ba65f/95797707923.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b44396697---wufefutinidenasova.pdf
    • http://ylgems.com/file_media/file_image/file/90327991585.pdf
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/k1j2p44hv2grr7ncm9qcm4kg7h/7252275482.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/fd9be9f11fb8e3334a9ed54e99f16998/29304373691.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/2839cbf5b34ab7e589aad04137d06983/fezixozuzavowejuwuxoku.pdf
    • http://amandatravel.com/userfiles/file/sirofekijijilatevosoz.pdf
    • https://b2cexpressdemo.com/userfiles/file/zojefevepigiwotif.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/63540445740.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfefa8ba372---83007575125.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5e5d3087a---zimupon.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2033a24fa---ridojutitekujifasovuva.pdf
    • http://dashoernerboot.de/userfiles/64128686147.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c9883a21521924fc958ed7e53a4aa663/39084104072.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/22c6850768d055bcb19bd80a1acd8a4c/galutedutigovebizerajuzu.pdf
    • http://tele-klass.ru/i/upload/files/lokaxu.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608042297628d---62854319381.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=in+on+at+test+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_off0000c318.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC318 16792 bytes
font_01_sfnt_off0000db2a.bin
c990cca002c5489c73de2a767748ba186dea08625e8dbb46ee5cbf4aa7c0608c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2A 16700 bytes
font_02_sfnt_off0001069e.bin
96e6dfa822c6e13a6403d6ae321fb89393012a526649e10f9bd49971c3059a47
pdf-font-stream PDF embedded font (sfnt) at offset 0x1069E 10204 bytes