Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf093567b5eefc59…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 08:58:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 028ac4eba5bcc805bcc37eb3aa1a0665 SHA-1: e4bed94445926ae3ce41287b2f82b9fdefafa7f2 SHA-256: cf093567b5eefc59d50b806ba113069f2686a9a280d40eba93f8696916d64e96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a free game hack or generator. The primary malicious link redirects to infrastructure known for malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious website, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.online/app/479516143/minecraft-free-reddit-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/tiktok-free-hearts-hack_GM835599320.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5289 24976 bytes
SHA-256: 9345f62d607408ad944754c510eb7e87c497e5b0743d95fcf3cdd78ec330c585
font_01_sfnt_off00008b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1D 2840 bytes
SHA-256: 20e88e247102f07c6a70b4d36c7da419714b68793fc4cb00c42292950da9c9bb
font_02_sfnt_off000094da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DA 17744 bytes
SHA-256: f948482fd1df41cb9f23d99423963c320106fe54258b543107269e74c7833838

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