Malicious PDF — malware analysis report

Static analysis result for SHA-256 84bf10d914716d3a…

MALICIOUS

PDF

101.6 KB Created: 2021-02-02 12:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aef98f04e24e2ce81e0f57066d22df72 SHA-1: 1a83dfbe3ef7cec573e3a07729d173a4b9ccfb2a SHA-256: 84bf10d914716d3abcc3c765d75e6a08b53349ebea173d0665918892d017420e
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting characteristics of a link farm. Heuristics indicate it's a non-clustered link farm on disposable hosting, with one URL specifically flagged as a potential redirector. ClamAV detection and ML classification confirm its malicious nature, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9573

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 https://leonvi.ru/aws?utm_term=android+studio+with+kotlin+support PDF link annotation
    • https://cdn.sqhk.co/pategazikiw/oKMVggB/candy_crush_jelly_saga_apk_download_uptodown.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410714/normal_5ff34e1e34781.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/Pjkyjax/tabletopia_steam_failed_to_login.pdfIn PDF document text
    • https://cdn.sqhk.co/disovaje/fjenYig/dajod.pdfIn PDF document text
    • http://sikagez.22web.org/best_travel_guide_books_for_new_zealand.pdfIn PDF document text
    • http://budonap.iblogger.org/android_studio_emulator_app_not_installed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489834/normal_5ff9b3124c014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427519/normal_5fdd0c56bd4d6.pdfIn PDF document text
    • http://fezibinuzot.iblogger.org/kanonuximumudopemulo.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/drhagf1/lirozesokupabavofolalu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/bioconnect_4._7.pdfIn PDF document text
    • http://jopavufugas.epizy.com/51886522264.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/54894080004.pdfIn PDF document text
    • http://najaxobefirag.epizy.com/navya_serial_star_plus_song.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17587 4748 bytes
SHA-256: fbd324f805b82fe6a89a3b53b912cbb80d204c63b106e87c3368b8cb5fbe1e99

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