Malicious PDF — malware analysis report

Static analysis result for SHA-256 702d0c87daffe4b9…

MALICIOUS

PDF

73.6 KB Created: 2021-09-08 12:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 09bac9164fffb7b448ce5378615e48ce SHA-1: aa0ad88c83e33128ea02eb509a805fe94a534e8d SHA-256: 702d0c87daffe4b980c8a30110eb194ca2d5e201d335aeab8f48ddcad374be26
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier clean score 0.2255

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://studyhalltracker.com/files/file/7164375843.pdf In PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/80ac8d99018032e71632484e62fb6e17/letolesopusunoz.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/59564828981.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/xizesu.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/14532657955.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/bizirofejevegukamum.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/99601273359.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/nosawiparijej.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/3b762b046e3f0d05972382f6f602fcfd/46810689844.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/54424384018.pdfIn PDF document text
    • https://olterus.net/contents/files/tumiwopodelixuro.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/weruvixosidejaraduguku.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370f14796f2---taxevojurezixisozukakejo.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/42090008841.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/xixomekewolaborevalab.pdfIn PDF document text
    • https://adikkedua.com/contents/files/25999933648.pdfIn PDF document text
    • http://unionasset.net/file_upload/spaw_upload/file/20210903201503.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321f192208a---varinawuliv.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/rerewelet.pdfIn PDF document text
    • https://forssh.com/userfiles/file/kowugukitemujimidusokuf.pdfIn PDF document text
    • http://scandinavia-ex.com/images/blog/file/lakive.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/wufogiginumusereri.pdfIn PDF document text
    • http://asja.ua/userfiles/file/68876389094.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021090810183273499.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/bavewarepigix.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/7305478496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=douwe+draaisma+pdfPDF 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_off0000cf2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2D 19204 bytes
SHA-256: 64051aaad6e3d06528098c586ed189081fbd409c1bf16a4346e56b5cf412d487
font_01_sfnt_off0001014e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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