Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4b0e3d989e8910…

MALICIOUS

PDF

62.3 KB Created: 2021-09-09 06:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 2659e8ac530b72a6bcb0e331236ef3bc SHA-1: 5e5d48c468f0655c4c8f77cde9e586320f91609f SHA-256: 7f4b0e3d989e8910b180ccf4b7e61e2aec8d208751d2995cafb6854998bf387e
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9246

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://dioblina.eu/userfiles/file/junoxeromumasamemubiz.pdf In PDF document text
    • http://polimak.pl/userfiles/file/86939553064.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/hpkk4baroror3rgnd0mbeej0ga/29154974245.pdfIn PDF document text
    • https://ww150003.linebot.net/upfile/files/20210909100616.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/dibifipamovivuxag.pdfIn PDF document text
    • http://offerparts.com/upload/files/sonawilufuwuvodadav.pdfIn PDF document text
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/25441075536.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1f7111abb599164d896e66ab11f176d1/56774515046.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/xikipafijomarefufixox.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/valadon.pdfIn PDF document text
    • https://aradmissions.com/ci/userfiles/files/32115639545.pdfIn PDF document text
    • http://dodogs.ru/sites/default/files/file/44676203549.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/36913472598.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/44959335776.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/40239472949.pdfIn PDF document text
    • https://denimder.org/resimler/files/81735542063.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/xekesamonesegawomexarog.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/wujeferuziruzo.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161396dbc9b2be---zixobizomonojatekikejurib.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/70748044885.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/bavapaxaxonofenuzavise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=shoalhaven+historic+vehicle+clubPDF 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_off0000e102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE102 10708 bytes
SHA-256: 66901b1ec9ad17ed02467835ed2448669e4bd930bd4b91f019312e6b47219d1a

Open this report in the interactive analyzer, or submit your own file for analysis.