Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43712c122c4c9c5…

MALICIOUS

PDF

81.8 KB Created: 2021-07-06 00:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1ce79ef9f74053d12ee52e5dcb72a4e3 SHA-1: 2dbeecf753938afddf15253e23c7472093fdb9a0 SHA-256: c43712c122c4c9c5cc2f6374f699584a796941e850ee74eb9bff07c76428a45e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links pointing to compromised WordPress upload directories, indicating it functions as a link farm. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to phishing sites or download further malware. The presence of multiple distinct hosts and the use of UTM parameters in some URLs further support a campaign to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4834

Heuristics 5

  • 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
  • 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.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c6859914ab9---roviler.pdf In PDF document text
    • https://aashianarealty.com/file/95104820802.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e8c592f55---35102875899.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/purimufatabasusotakinaran.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd63251c1f---49768000858.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/149d8ad427274b593ba513e09337053c/11609705137.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/68055736100.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609def43d25cf---64742983392.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/22gfci2e7nc52is79ipea6icqp/tipukom.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/47913480661.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/hj5pt0rvsnved6505emk5jhsi9/59990688005.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/nizezig.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/c503af6a7e535c1a950754b4008243df/niguka.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d307b88b98---96651468494.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/putivofexomifaxo.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3469a07f04---rajerirusaguguxe.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/xozepipagoramos.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b3a1b2179---67051601366.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/11241040483.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4c2103216999a90b0c15cb14243a7924/68979278568.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/10ee9d8921ba12ee689fe71feea6f014/nifomokik.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/40461697781.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/mojemixavukoginagaso.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/c243cd92b8c33845f56544ab5edbe1e4/13782419547.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/4aedcf5994a5be044041d46948d54fee/sovufaw.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/4be57d544dd725fc7a3f6b95fde18936/kijuronakiwoxumedemig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=two+point+crossoverPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F0 17692 bytes
SHA-256: ce47af24cff8b597f1b0022e293d9d5972cebfd6381adda2a05ce0a6a6550990