Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4815cbcb7090ca…

MALICIOUS

PDF

62.3 KB Created: 2021-09-01 00:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e582cf9423f2e7cbdd980c4c330653e9 SHA-1: 0546701d6552e568052cacf354ecfaf19c9c587e SHA-256: fd4815cbcb7090cad0d5765ec741b62b52affd575cf6d3a1dac89f538b1b9704
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to lure users to malicious destinations. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9583

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 http://anquocrealty.com/uploads/image/files/rowozerekiwixogeseweri.pdf In PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/chnhi7cv9bsfqsm5ielf067uv4/91585107929.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887b8764601---61590020058.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/10943603016.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210722174709.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/62cf9c5c1c1077ab6e2112d5913baca5/lepuzirafomuruxi.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/paduvebofabubofajuped.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/edc9c470f1ef25687e89da90d10bee43/fijuresiwedi.pdfIn PDF document text
    • https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/8a46765cb9df78db27455b1c134af4e2/tufafetu.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/7671d3cc69f425315538875ec228cfaf/63030065302.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/ca8e01d2dba79d0ad85169195d1d837d/muvopa.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/67430387962.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aadff170707---tiwekusakajunibevopi.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/5912f5fc89ae3ddba24900e27f91da32/51574444016.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/24865265715.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed2cb85d94---xipetesasomedelida.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/69726756235.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100474d0451d---powaku.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607991752f44a---96856621147.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/42930918039.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=fried+bread+cubesPDF 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_off0000cb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1D 10212 bytes
SHA-256: 8a2ad19861d471edb612e10afa4f6a29570a59583bd705ee4b3c8e9861232b3e

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