Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e7cf0faba8c9d1…

MALICIOUS

PDF

68.4 KB Created: 2021-08-02 15:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 06e5132a52a15603d62d51608de822d9 SHA-1: 15353e2a6d66b99e9a15706b0491d7eb02d21746 SHA-256: 91e7cf0faba8c9d1117b25c6af5c1dedfeba75c454d1abb28217b30b241e737a
154 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains exploit code. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and disposable domains. These links are designed to lure users to external resources, potentially for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7082

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://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/689df4efee7630fec3dac66d6dbe7343/91142005307.pdf In PDF document text
    • http://biotledlight.com/userfiles/file///derisenaxezo.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a64cc02100---44622384309.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/85204295071.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/65540704047.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/a02f9c1d476e56d133b517240ae88413/tadifawagaxopewe.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084a73f94e0b---felorabesowovimez.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/19745988911.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f934fd8a90c009cf92a1a20a456f921/97608244585.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/41397707814.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/mabevowenonopevu.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdea81ca07---monotuginenazuneka.pdfIn PDF document text
    • https://abeess.com/userfiles/file/xosujukageki.pdfIn PDF document text
    • https://songhong-thudo.com/img/files/38453133815.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/61597029948.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16095ed4a54a4a---26900742339.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/2a36011c4b5b34ae2801b2102e91db31/nasufufosemef.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/d5nkhjjblbqm5gtt921lo8hcek/28837983262.pdfIn PDF document text
    • https://magatek.com/documents/file/xoturidu.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607be975889df---62378595746.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/aaac650cc1efd204d593a6820d2b2a5b/sexopujofili.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094600ac662a---21718153065.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/18635940876.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/db6b78019988265c6f98159f5a28f482/84410805036.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/zitobozetif.pdfIn PDF document text
    • http://edgecs.net/documents/85075795727.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=sample+application+letter+for+volunteer+work+in+hospitalPDF 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_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 11164 bytes
SHA-256: ab8244992e34aa85d51f4a485b1323c730863b5a7248a7e16df8b1e8d6661b14