Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdee06b7f2d5e20…

MALICIOUS

PDF

85.9 KB Created: 2021-09-21 09:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cb6df9fc0c818e2fef3ff5e5cfa0d1ac SHA-1: 396711baade4ef3765dc662d29b9c715783e4dd7 SHA-256: 7fdee06b7f2d5e201c027d5281db2d0fef86b4d2782e681e4dcafac8570c7d82
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, with a significant number pointing to disposable domains, indicating a link farm designed to obscure malicious destinations. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5841

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://webspace.mysdam.net/images/newsletter/files/89509288452.pdf In PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/zimopesil.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/66945996420.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/63872424794.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/6238382318.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/xexaw.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/8319749880.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/60340606612.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/19117633587.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/mowajoxexipapukotadub.pdfIn PDF document text
    • https://khonggiansangtao.com/platformecom/img/upload/file/wugezexevukesil.pdfIn PDF document text
    • https://primer-spb.ru/files/files/dufinafinulemu.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/nolunoboxivifake.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/27270798635.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/21063438272.pdfIn PDF document text
    • https://renault-service.com/userfiles/rizik.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021091020064573499.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/36383987626.pdfIn PDF document text
    • http://gymostrov.org/gymostrov/userfiles/file/gapugigipigaxotonijetaru.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/pasaxemu.pdfIn PDF document text
    • http://energy-labels.nl/userfiles/file/wofikobexu.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/mapagijosuxe.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1614653204b792---18930286704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=device+faker+android+10PDF 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_off00011f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F48 20724 bytes
SHA-256: 8f610b655f926e78011fe2dbbaa9e1bb57fdebed35de2f166c2b4efb5ba32c59

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