Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd676252d4150e1…

MALICIOUS

PDF

68.0 KB Created: 2021-09-08 09:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6f0bc5857e9e62fe4300a563889f4dd0 SHA-1: 05f120ac32b088d27e22dc65e63944d79d369c46 SHA-256: bbd676252d4150e16f1f25b204aa584980b434eeab9d5e3be86e61dbf52b7f4c
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate an attempt to lure users into potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7906

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://jingmingtai.com/filespath/files/20210825002014.pdf In PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/54173471349.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/kotavobanizevo.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f31c7916207cb87a9e8818e40c7b4aa7/zuluribolubatebet.pdfIn PDF document text
    • http://enewind.com/pliki/file/tovaferijexemopujosuxixi.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/nuvukafazixakatavuzivumoz.pdfIn PDF document text
    • http://goldmustang.com/files/files/19648860506.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/sv31i8f9efdcrgeg082uhk6357/89209268169.pdfIn PDF document text
    • http://fabtur.ru/upload/files/duvisutexokuzebudir.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2637cf1d9a---kotozed.pdfIn PDF document text
    • http://keacg.com/upload/files/78396683715.pdfIn PDF document text
    • https://landi-bg.com/images/file/57574395909.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/25673601740.pdfIn PDF document text
    • https://coluer.ir/documents/file/6403105757.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/e5b5010bf62a614e288b3f3e5ecb8958/69450090912.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/jawigurav.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115bd31e80d4---42512581571.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b4a037264---16919061438.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613081b2247cd---21178117427.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/josawajox.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/bezatunoguwakakenilejat.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9f3eebe4f---mapimedegolela.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=uncheck+radio+button+adobe+pdfPDF 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_off0000d3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AC 17456 bytes
SHA-256: 80a29fd2ce08802f6ca6f92d5763b811c5bc6e8ed37aefdf0f0509e0a79f962d

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