Malicious PDF — malware analysis report

Static analysis result for SHA-256 241111dc3425999e…

MALICIOUS

PDF

66.4 KB Created: 2021-09-06 00:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 593121d7a3d16ad0bde3797850563b2c SHA-1: eb102ed48d9a269e0a5d29f8caf8c7672ebdb8e4 SHA-256: 241111dc3425999eef4742b69bc10eebeff40c5cba1ce35c28a1d857eb81eebe
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and other potentially malicious sites. The primary attack pattern involves luring users to these external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

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://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073822b2fb3a---56655559723.pdf In PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/22324580068.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070312f005d4---69211372621.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/vuxupexiginub.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/nosenogefazafapidobix.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ja2gopvm6naf8af6v32007s314/sizujexe.pdfIn PDF document text
    • https://jmclimatizacionhvac.cl/images/subidas/file/vimetiso.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/22936744728.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/genajomobuwodu.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/xeseruluwipozon.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b302345d537---60075690254.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/69938c0808cbda1d5a337ab7289db94c/71025286255.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/k602ms9c3iskrrnqrmgdjumv74/batem.pdfIn PDF document text
    • https://mfdesign.hu/files/file/zedozizife.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/4558229505.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/90692809366.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/9b1c90ae95f9fc90f5170df543f436a6/34956927376.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/58996376994.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/rasupexasufakesodudenuxom.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c73ead026---78787867637.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210826154509.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bad5dd9a3a---bimenosuvagurexubevurizis.pdfIn PDF document text
    • http://zzquansu.cn/d/files/leganibip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=practically+speaking+2nd+edition+pdf+redditPDF link annotation
    • 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_off0000c023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC023 11124 bytes
SHA-256: b06b6ae03a7dc4a9fd4d663e42bedec60138b7192ca2081f1e6c77bf420828bb
font_01_sfnt_off0000da1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1A 17020 bytes
SHA-256: 7c2e7b195d317721a7bd610050db8384afc37d07da05136747bdd356ab13c342

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