Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6857dff51ea916…

MALICIOUS

PDF

54.5 KB Created: 2021-06-15 20:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: db8a7719234636962cfa0c48e921a0af SHA-1: b049efaec863bf5e63ef3e9ff36cf2e403d17d84 SHA-256: bc6857dff51ea916536229fbcf99fb353c00e22fa0701af8af61147b8bd46b0b
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 a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to distribute malware or phish for credentials. The embedded URLs, such as 'https://laborke.ru/uplcv?utm_term=spider+man+ps4+iso+file+download+android', are likely part of a link farm designed to attract users through SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6272

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=spider+man+ps4+iso+file+download+android PDF link annotation
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085727aab7e7---mebibi.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/3mepa2d49dvleh5nouv9cv6t9q/bomor.pdfIn PDF document text
    • http://bonsaichik.ru/images_uploads/files/pesaxifuvinusovejulasugep.pdfIn PDF document text
    • http://www.kammerpop.de/files/file/75967054877.pdfIn PDF document text
    • http://fructusartis.com/i/File/26285550531.pdfIn PDF document text
    • http://araonline.hu/uploads/file/purapogemuw.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/fiwasigitejivavigota.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c6ac904176487723bd205128af1b0afc/23339334246.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab73576fbf---53651871195.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/k1hfub1s5m5ad16u27lb4au4hm/foruvovoririvowuvexufit.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/2vfb278jkf2s8cq4gif1nglmds/15746045679.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/9m3980qk71pfsdtshi2ckckffh/3048448810.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/kakilikodutupigizo.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/97c2cd40c047bcf75294157a2736dd42/4236805839.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/8aa61cf52042f4059c09616c6c6252ea/73947441432.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fb4452366---nunugafa.pdfIn PDF document text

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