Malicious PDF — malware analysis report

Static analysis result for SHA-256 62559765bbcdd70c…

MALICIOUS

PDF

58.1 KB Created: 2021-08-28 09:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: a0425c274b37ccf874713193f5f7b501 SHA-1: 1056e2896b7f0cc855867c76e8481a361545bc02 SHA-256: 62559765bbcdd70c16affd080b23d38b74cf0dad9bd71114a9b9fce11b658724
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or malware distribution lure. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to exploit users via social engineering or by delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7333

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 https://laborke.ru/uplcv?utm_term=you+know+something+is+wrong+when PDF link annotation
    • http://king-pro.com/userfiles/files/91185751472.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dc0d3ed34---36856708335.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/nonotivefesapo.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/93800987615.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca6fe98354---gufiluropamofinipumeto.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b293421f75e---texupaxe.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d144af80a8b8137eb9edad8c85d0d791/fexinox.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093ac33326f8---26336252015.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b54bd63c65---46066281268.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609785f08c4c9---wenenawasazagevedoz.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/euirq9itp70cdo5udj48igf861/xovivutoz.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/32315196168.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/kubujo.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/332481adbc1760e8e0770883f19f7a88/zowogesi.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/4mkqtoltkeo43hp7ftecrmtfvj/xojemavijab.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/regoxibinobabevegagib.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/gigudenamajamasejugekejus.pdfIn PDF document text
    • http://agrion.org/upload/fichier/22007134183.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/36558602243.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a7505ede678---61238405270.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/vudekefuza.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/d63907b1b4339262eed27b2a6a5546d5/46698586493.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/45fe735552366a1a8f9ea537a0969ae1/36528512784.pdfIn PDF document text
    • 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_off0000bdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDE 10608 bytes
SHA-256: a485ce5eab650c9ee9d41a76c307ffc337e7559a751751e6bdc468914e11f6d6