Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a41d29da611490…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 09:52:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 21825cfbc546d3873bbbfcc9d2da24c1 SHA-1: 7ce92be170b43d52cd7fe2e4e4331ecd6137f207 SHA-256: 25a41d29da611490ee38d9bbda18527b41bed90350d2e5bb3978321afed7f40e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary malicious URL identified is http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-game-hack. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://netcdn.tw/app/479516143/how-to-get-minecraft-for-free-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-mobile-hacks-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-red-hoodie-free-now_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-mod-apk-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/earn-free-robux-plus_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-avtar-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/descargar-hack-para-hackear-cuentas-de-roblox-descargando-algo_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-august-2021_GM431946152.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
font_00_sfnt_off000033e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E2 21964 bytes
SHA-256: f4099194bcf73e6b1ce0ba1c56ebb1e9337ea4f6f90b8b6b6f5445eaee9d2a6e
font_01_sfnt_off0000647f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647F 18164 bytes
SHA-256: 38b14255ac27b6861525ff1bdc726797405021bf36bbc514593b3ffe59b08c64

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