Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d18f3e3a101738…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 02:36:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ba769f7cdc7d543d836c5cb0ffee77f1 SHA-1: 9ecfcab444ba0891d43eb1639dd2121be09bdd56 SHA-256: 54d18f3e3a1017384388f961bcc0c7ef03583542a85bb4391fa911dfed2378ac
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to a malicious redirector infrastructure, masquerading as a game hack generator. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document also displays a fake CAPTCHA, a common social engineering tactic to trick users into interacting with malicious content. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coinmaster-fan-page-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/is-minecraft-java-free_GM479516143.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_003_off000049db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DB 24840 bytes
SHA-256: c9407a58a420b7d06bf93ded0a4aa7b9b961686dee95aa7be7989cee56b0a940
font_01_sfnt_off000082f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F6 18412 bytes
SHA-256: 362c1088091ca1acb0efc5884e6feebbf648ceeb811ef0e2358676d84db8b2fd

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