Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d0d95b7abcdceb…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 10:35:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fd753a11682f64668a6628434dedb35c SHA-1: b534d227e188208b99e9715ff9011a4765917300 SHA-256: f7d0d95b7abcdcebf870cd3c0fa208ae282345f97888770e6a3308db9179518e
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to a malicious redirector. The document body and embedded links suggest a social engineering tactic to trick users into visiting the malicious URL. The presence of a fake CAPTCHA heuristic further supports the intent to deceive users into performing an action that likely leads to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/earn-free-robux-for-roblox-game-hack In PDF document text
    • http://lib.fisipumt.ac.id//repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-kat-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F54 25836 bytes
SHA-256: 2fc657a2c82156f46675ebc49de8a363ab61821d981494a65ff769cb01a90fd5
font_01_sfnt_off00008a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A74 18316 bytes
SHA-256: 81577c12f28394e63c3fe269139937f952c5f2f271c4ac7315843a65914bc4b9

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