Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3482beb0ca6c026…

MALICIOUS

PDF

74.8 KB Created: 2021-09-07 19:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c879faaeb5c2194ea16d5e7b71c751e0 SHA-1: b288b3a23826308b277bc05bf11fc848e659ad99 SHA-256: f3482beb0ca6c02640f344dc2b35575e7dd9106a7ad8cd038143461b0c0a6e09
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to external resources. Several of these URLs are hosted on compromised or potentially disposable domains, indicating a likely attempt to lure users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://brezov-gaj.si/uporabnik/file/41873833643.pdf In PDF document text
    • https://pinkrali.com/calisma2/files/uploads/dojegidinanafi.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/gojukogivizoxazoro.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/4249627694.pdfIn PDF document text
    • http://df-2.de/images/daten/file/69596271853.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/wogeromefopalewawusetir.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/79985893794.pdfIn PDF document text
    • http://emploi.nat.tn/ckeditor/ckfinder/userfiles/files/tevoxedutimerotivugapun.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210719_58258A64AF7338AB.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/77646821601.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d383505e22---lamurelubabupisole.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6908c2fdf6---vebawizesufabivesemum.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/gidofikokupalurisafon.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/fokipupunaxojosub.pdfIn PDF document text
    • http://hzbaoyan.com/images/upload/File/95799074829.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/vnknqc61bp6imvcbgifdb352a7/mozezazoz.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108847466c23---24196996741.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/robowakuvikifejuxeli.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210621231032891.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/garikalapitolodaxirazone.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/8d7dbd47c96d74815ac7b0470e7a480f/nefetelafebapipewerewez.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/92630325949.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2945bbfcd1---7449100928.pdfIn PDF document text
    • https://frontivo.ro/userfiles/file/6047022953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=surah+fatah+pdf+with+urdu+translationPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC88 10724 bytes
SHA-256: dc681174a1498c5d26cc13f71960025d934cb6eae596abcca00d2e1f7b67be44
font_01_sfnt_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 20364 bytes
SHA-256: 7054acea2a968c7f99db6a55ded51f30823a32bdaef06083a0073f92698a8528