Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5fcaa89aa03393…

MALICIOUS

PDF

52.8 KB Created: 2021-06-09 12:16:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5f8381a5474109dd0c5f5147b0619849 SHA-1: cf808955942ae8c69609b0ac89e2def12035c2c5 SHA-256: 2f5fcaa89aa03393d6149bb439e05cbaa5414e2297f2af1197b881b2d1e95f4b
160 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' which redirects to malicious infrastructure. The embedded URL https://netcdn.tw/app/431946152/how-to-hack-roblox-to-get-infinite-robux-game-hack is identified as a malicious redirector. The document's structure and embedded links suggest an attempt to trick users into visiting potentially harmful sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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 https://netcdn.tw/app/431946152/how-to-hack-roblox-to-get-infinite-robux-game-hack In PDF document text
    • http://dieter-sauter.com/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/tiktok-views-free_GM835599320.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/gift-roblox-com-free_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-no-pass-requiredfor-pc_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-do-you-use-tunturned-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F65 26588 bytes
SHA-256: 5d6e47cd3dc3c0efa9dfffc6ec74e604fc33c47a97a505c6dd0fa70f36f3847c
font_01_sfnt_off00008ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA9 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off000098cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98CB 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_03_sfnt_off0000aa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3C 18712 bytes
SHA-256: 1cbc6ee2fb83768b26a022b37031ea6758fc05c21e9c6924b8512d383cc0bf24

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