Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f65fbe658a7735…

MALICIOUS

PDF

93.6 KB Created: 2021-08-25 08:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eefc6c943c440e9bddc385e269b61bfa SHA-1: c3815982fc9a0ce220f933e93bfad67afbfd387d SHA-256: d9f65fbe658a7735349d8be2e47dbe7b9b1aef806c33f7ddd0dcfe1f60db256b
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to host or redirect to malicious content. The presence of a 'download button' heuristic further supports the idea that the document is a lure to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081a98322fbe---75816554954.pdf In PDF document text
    • http://snotlicker.com/clients/10243/File/somonujugugugitokufofo.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/un57abhk1d78ben7f395d4hgo0/76379210777.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/fakofuduponigebuja.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021062723494373499.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160783b098647a---4268823099.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/23132070969.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/vaviwomalodepiwiwisamo.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/03af557c5628b3afecedfd197a6d7099/gimawetutisevokebosipukix.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/wojivefesetusemofazi.pdfIn PDF document text
    • https://netpage.info/userfiles/file/xobizojixas.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/wufuxatulijopopujofod.pdfIn PDF document text
    • https://interface-graphique.com/upload/editor/file/vanawesiwe.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/reromisevuzawe.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4efb755e9---81687927695.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/kulidutorijafowizu.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/sogexuvolenupesipizal.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/cbdce4cae9e97c7aa1a80762635946ae/48529974106.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b43844a22---gubarogebiwopevepimoviden.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/31435756655.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/8pn8avmqfr4a1nm2970a3ipoj6/21051341324.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf417e1c394---namimon.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919b3a67589---tifodigedulixolerapet.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/lipejutinumibinukijad.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdb4fc13f6---tavawibubojek.pdfIn PDF document text
    • http://vtaky.sk/media/file/71374061775.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/31752760567.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=online+excel+to+pdf+conversion+freePDF link annotation
    • 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_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 16780 bytes
SHA-256: 23716734013537e739c265b0727fd41fadeb16fde0b990ddf41efb95a1c94aa7
font_02_sfnt_off000139de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DE 10644 bytes
SHA-256: a6f1c9edd4a67f4f2ad4da7726bdba138194b07a09fe2a27dbe5a998d0c3dd14
font_03_sfnt_off00015265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15265 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516

Open this report in the interactive analyzer, or submit your own file for analysis.