Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ce7ea0a121665b…

MALICIOUS

PDF

33.5 KB Created: 2021-07-01 06:49:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: aee03013a12bb9b108fd303eca58185e SHA-1: 1b15294061e16f0e67ad4964c58638b6f54f75c0 SHA-256: 44ce7ea0a121665b64d66488b17581a6028ccda35089d56ad9db49d024c75bd2
160 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary one identified as a malicious redirector. This redirector is associated with lures for game hacks and free currency, indicating a social engineering tactic to trick users into clicking. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure reinforces the deceptive nature of the document.

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/instante-break-block-roblox-script-hack-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-codes-noverber-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/injector-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-sell-a-tshirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/redline-hacks-download-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-robux-in-roblox-inspect-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hacking-roblox-with-code_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/assassin-roblox-cheats-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/cr7-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-free-item-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/robux-hack-no-buying-apps_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/pubg-uc-400_GM1330123889.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/pubg-uc-quora_GM1330123889.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_off00002fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEC 21148 bytes
SHA-256: 137ed24749601b927d137f58ffb43c8ce83f9eca3eb2692a4d830483a4ce0150
font_01_sfnt_off00005dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC0 19056 bytes
SHA-256: 4f3691c9bf8fbfe2d7268f9ef380ff5b7e76e12d5b2ca1e57d84714cacac5019

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