Malicious PDF — malware analysis report

Static analysis result for SHA-256 3afbf6a666e2c9e0…

MALICIOUS

PDF

45.4 KB Created: 2021-06-10 17:46:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7826f3ad2677693d28ab39a58ba43f52 SHA-1: 796ddf2a75d3bd658ceb5645183f79bc8fb70798 SHA-256: 3afbf6a666e2c9e014ce7474bd932b0842ecb20daac4d9f0e90eafa02b0cece2
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically advertising game hacks and free generators. The ML classifier also flagged this PDF as malicious. The presence of these lures and the redirection to known malicious sites indicates a phishing or scam attempt, likely designed to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/i-want-to-play-roblox-for-free-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-followers-on-tiktok-no-human-verification_GM835599320.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-codes_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
stream_004_off00005182.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5182 26472 bytes
SHA-256: a23422476c242e98471675d6c40f364dc33dfb5371ee7449ea4146e0141a866d
font_01_sfnt_off00008d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D51 18812 bytes
SHA-256: 06e1c8872afda8b962368d2b7ecb3a49e0fc2ffae6969e6a4b99120aed8f5c09

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