Malicious PDF — malware analysis report

Static analysis result for SHA-256 b488dcdfcf63134b…

MALICIOUS

PDF

90.1 KB Created: 2021-09-19 23:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: f5d4b1dc2ed6c1b8396b83722011e76c SHA-1: 432f0389079d472d5f2620bfac3d972852a34b4f SHA-256: b488dcdfcf63134b4602527720efe867659f238ddbca1ebca043b45dfdbe345a
124 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The presence of a link farm with numerous disposable URLs suggests a phishing or malware distribution campaign. The document body was unreadable, but the heuristics point to a lure designed to redirect users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5731

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://boissee.fr/userfiles/file/sowuwaxalofegumifed.pdf In PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/91678126956.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/fukojawuwulokigole.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/44337441802.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/86390635555.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/judofanijufewo.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/99136509279.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/wodikosepusujiwisinonaw.pdfIn PDF document text
    • http://horvathortho.hu/tmp/28230838164.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/tixesofakodomagaw.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/xetemomipefinisiwoz.pdfIn PDF document text
    • https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/64419500039.pdfIn PDF document text
    • http://charontrade.hu/data/file/nazagawuwoxafuvajadujir.pdfIn PDF document text
    • http://tnhmc.com/userfiles/file/75104796920.pdfIn PDF document text
    • http://yujinpharma.com/upload/files/nawokukebone.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/fuwosiwudasaforunuzeroj.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/wuzolobezazofabudij.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/bixebepinijabaridajovatak.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1612eebe1cee8a---dukidojupu.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/77906253112.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/pakot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=hill+climb+racing+turbo+driving+racing+3dPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C65 10884 bytes
SHA-256: 0456436426e9dc2f8963e87895aa1ba08604c3ebf26aabdb906b416184059409
font_01_sfnt_off0001254a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254A 17364 bytes
SHA-256: 849e8cd8da570c0f253139ad3c6bc9a6337b77f912740ff15cfd7fc02bef1e62
font_02_sfnt_off0001527b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1527B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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