Malicious PDF — malware analysis report

Static analysis result for SHA-256 562b81cd99073610…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 00:55:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8b7fd7a20a8a369b06fb1560b7740e01 SHA-1: 81f1b84967362df15c228ddb7f92936ac6863555 SHA-256: 562b81cd99073610041cd94cfffa2f57631b4c02a666f6573f6452da6e3a92e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link that redirects to a known malicious domain, disguised as a 'free generator / game hack'. This lure is intended to trick users into clicking the link, likely leading to further malware download or exploitation. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/player-esp-hack-roblox-game-hack In PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coding-script-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/cool-hacked-weapons-roblox-script_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-being-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-how-to-get-free-admin-in-any-game_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_off00002fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCA 21760 bytes
SHA-256: ea77f8709cd3eacccd07198a539e7b3ef7b95a94a334bfe1fa384c4240cb7390
font_01_sfnt_off00005fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD7 19164 bytes
SHA-256: 5dbc68ee291c1f3ed95d4eb0a9efac371bd1f5f75eeaed3a642539b5384c994c

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