Malicious PDF — malware analysis report

Static analysis result for SHA-256 759b39790abc155f…

MALICIOUS

PDF

62.6 KB Created: 2021-05-06 16:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1426b06caccd9baeab6783725881baf SHA-1: 9b041086c7a4a98a9fd2e94d1624274d8e871add SHA-256: 759b39790abc155fa0dd514f17703da1f257b1edd7d10a4a480e40a01ff4813e
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs point to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8553

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/v0r95b610h0s1ka03n8v21uk7e/wasebada.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/9620ef8d3e3b94bee64c096742d4ffd3/rujulileboxozojanege.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0d8e730fa---85330111148.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074880e1ebb9---wubajo.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/6fc41947a5b58c67256459c80e91d36b/dasebilupuluberow.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608224b67bd1f---xamasufalevum.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b957236eb1---pimewevatefugeselokev.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e49c7e682f---47690835421.pdf
    • https://advantagelic.com/singhania/downloads/file/24592858113.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4161e0877---83462542713.pdf
    • http://andlupa.com/userfiles/file/xipibixekagubotuje.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1608231ad6655d---nexesobuzavixizilemaraf.pdf
    • http://apexibd.com/uploads/fck_uploads/file/gejelubarubesu.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160774e15e5396---gadebu.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7e88503b608d85f0bf8e702f671c6575/pesemig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=according+to+matthew+full+movie+sinhala
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d324.bin
12bfa9fcf0e0d056280bff4fff358881b28f311bd46474569ce18c9137a582bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD324 5456 bytes

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