Malicious PDF — malware analysis report

Static analysis result for SHA-256 b785d8a4456f80c2…

MALICIOUS

PDF

33.2 KB Created: 2021-07-04 19:19:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: acf9ad167a254df5753cb39270b32c65 SHA-1: 6846d0077ee66eee5bc015e61e3f0707b2fabbbe SHA-256: b785d8a4456f80c22ac51ac839417c79d34646018479de3723f47e281a9acc0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and generators, directing users to a known malicious redirector. The ML classifier strongly indicated maliciousness, and the document body confirms the lure by embedding a URL associated with 'how to hack minecraft'. No scripts were extracted from this sample, but the embedded URL is the primary indicator of malicious intent.

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.tw/app/479516143/how-to-hack-minecraft-pe-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/this-server-is-hacked-roblox-id_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-ninja-animation-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-hood_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-game-pass_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-really-easy_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-song-id-billie-elish-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-robux-with-cheat-engine-65_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-get-your-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-in-games_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-2021-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-you-hack-to-get-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_off00002f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0C 21672 bytes
SHA-256: ebdfa81ec024fdef461b51f7b912bae36e0b0e8e2d903d7eb1302e40ea450eee
font_01_sfnt_off00005e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E60 18488 bytes
SHA-256: 219457e29f33dfec07786a29e70830a20555f796e9e6bb3f533c171663b580ef

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