Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56ce1e0479c470f…

MALICIOUS

PDF

32.6 KB Created: 2021-07-05 20:44:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0301dd8eb2e2e2672835027b309de235 SHA-1: fc9cf1e2b48f9ed73b874f78dcef06adbd48f3bb SHA-256: c56ce1e0479c470fac5187e37760e5baf3a4e608edaa584052414e6307f87ed3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector hosted on 'netcdn.tw', which is flagged as malicious. The document body and embedded links suggest a lure for game-related cheats or generators, likely a social engineering tactic to drive traffic to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/hack-robux-game-hack In PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/robux-code-2021-free-game_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/roblox-hack-sharkbite_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/robux-online_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/best-free-roblox-skin_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/best-level-7-exploits-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/treasure-hunter-simulator-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/row-blocks-free-games-at-robloxcom_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/how-to-get-free-robux-without-paying-money_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/how-to-geet-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.mtshasyimasyari.com/__statics/gudangsoal/files/lazyblox-com-free-robux_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_off00002b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B1B 21848 bytes
SHA-256: 30ca8da36e99b2ccc2e729b1242470e2868fb6de33de9d9b7d777966906e30fe
font_01_sfnt_off00005b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B56 18724 bytes
SHA-256: 3ac7be5af293af38fa349e44a35dc9d744ccac9489df6a6de684f68f531fa54d

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