Malicious PDF — malware analysis report

Static analysis result for SHA-256 383705dbd5837324…

MALICIOUS

PDF

32.4 KB Created: 2021-07-21 03:55:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 8402fd132982a37c6e1bb336ac8570df SHA-1: a8e84733dbba9bdfddc734805be555251b6664a4 SHA-256: 383705dbd583732442076f181eba29b9a70b792bcf3791749be54af617619f8f
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' or 'game hacks' for popular games like Minecraft and Roblox. The document body and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/479516143/how-to-get-minecraft-for-free-game-hack In PDF document text
    • http://spentulib.com/search/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/how-do-you-hack-roblox_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_off00002c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C02 22372 bytes
SHA-256: 1f91bf296e871e0808b251d4db4b516c75a0a2507deb4ef2f6132cda10bf125b
font_01_sfnt_off00005dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD4 17872 bytes
SHA-256: 6fa695b9296659f7eb743de2dcac64eb87e125e0d99966acf8bb7a2f268f66d6