Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b6b480da10c615…

MALICIOUS

PDF

74.8 KB Created: 2021-08-07 00:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4ee855de9a3112e5b7804418b0795462 SHA-1: 74b9ab58e3c951ceeb35f4c1cee9e95839c8667f SHA-256: b9b6b480da10c615b21aa48047a221aed6170e9553bb150a53188c34288e190b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URLs, many hosted on compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8671

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=stilton+blue+cheese+nutrition+facts PDF link annotation
    • https://aradovan.com/userfiles/file/6358840019.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/409abcf297bb0b9d3dd208d89ad76b1b/93478002761.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/70544977450.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/resepamidu.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/59678111307.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/8307a3ac074e1d4210ddd3281054f966/23414218716.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4e0225c5---5408318738.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/sewugebizozawipowuvitiv.pdfIn PDF document text
    • http://capableapp.com/uploads/files/sajepafisivit.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160818e2eb052b---kigob.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210606_151000.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/151911371881.pdfIn PDF document text
    • https://binhvi.com/upload/files/mikufo.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/nasawaribazibawarul.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/37617227256.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/debowudurasu.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/f3ece897853cf7ab534fac5d9f092f39/90025743778.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/47dd618710274f0b13c8aad262fb53e8/83301881964.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/kozokupikanijixun.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/33466517886.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/aldlcd4ssi4b7ft25ae10m92gm/denerawaxaxizu.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe1f2a3b5a---19986039791.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609978a3bfcb4---23241670933.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_off0000e699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE699 17264 bytes
SHA-256: f806966ae06de33e3de42736411d641f9e188733ce501ec0257180e6f8db81e4
font_01_sfnt_off0001141d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141D 10748 bytes
SHA-256: 6f0aa47338c37bcc2d3b52bbce00fa7eb5354a21f8c3452a6364c93a6a139544

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