Malicious PDF — malware analysis report

Static analysis result for SHA-256 a327b60cc928619d…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 23:39:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c5abb3d35bd28bed25977efbfdaac146 SHA-1: 1d0a3aca03c6a3d831a15fdce9c6487f5b8eab92 SHA-256: a327b60cc928619de5114b2c9d9a6a66b2cee04428b50344001972a6c441f24f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on potentially malicious content, including a primary redirector to a 'game hack' site. The document body and embedded URLs suggest a scam related to in-game currency and hacks for popular games like Roblox. While no scripts were directly extracted, the PDF structure and extensive link farm indicate a malicious intent to redirect users to harmful infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/robux-now-game-hack In PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-character-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-roblox-clothes-temp-downlode_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/descargar-menu-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/hack-robar-c-uentas-de-roblox-akaka_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/tiktok-free-likes-no-verification_GM835599320.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-do-you-hack-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/its-free-meme-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-family-or-crew-roblox-one-piece_GM431946152.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-roblox-toy-codes-2021_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_off00003391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3391 21692 bytes
SHA-256: 2392bdfc224cec85b72d85d49c14ca4897da8fa0265b6814cc5bf2812b76d92d
font_01_sfnt_off00006352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 18716 bytes
SHA-256: 03a69881a9817a66c0040c2fae8bf7a58cbd83f3653c163cc6aeb0f94e57dd99

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