Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f2622ccb2a0a37…

MALICIOUS

PDF

71.5 KB Created: 2021-08-15 05:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 3a4dc9b6b68770fc890ad778dd83d5e6 SHA-1: c83db1269bff69d69d1ed795903b5aa909306290 SHA-256: 80f2622ccb2a0a3783f4de33b1b7dff4c4811f5f0d3b973cfc4759e64a1ebc74
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6658

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=british+national+formulary+pdf+2020+download PDF link annotation
    • http://say-international.eu/userfiles/file/forelobefoneraxopuvegulu.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/19375854278.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c00fc5c81a6---11192424375.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/setevivuledifigunurig.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/a8ad120d4ef77ce4223d972d38148920/54585765042.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/41255691516.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c30a13ea2f---tibubudetetororagu.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/bomejijejejudu.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/pasatigosopow.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9d79ad011---lekafinoge.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160759defb447a---jinapuf.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/pefefigufiwuvajudiwab.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16099aa37652f8---sizogipetuf.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a397f99111---28810003478.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd37beeea32---80437493147.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/23076662673.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/potowokufezusarusol.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/raleboguzoxiranelifivimas.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/nuxugadoja.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3de73cb2c9---dadupuzuxipa.pdfIn PDF document text
    • https://avenue102.com/uploads/file/55207372780.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/63849838356.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/1e9534e58be390a2ddf93433f101555d/lavit.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/954c6632fbcc2d60d2bb6e5e9e7b6842/xipoxubuvolaxa.pdfIn PDF document text
    • 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_off0000d928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 16800 bytes
SHA-256: 9c3a2905e02e20815d53f462d069bd74c3318b7d8d42b454f3542ad2488690c7
font_01_sfnt_off000104e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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