Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3b0aa8115ff4cf…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 11:24:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0e5d6c1050f25ec690cb94b9471dc157 SHA-1: 4a972da614f00fda048fd6c200420cf41fd57e90 SHA-256: 9f3b0aa8115ff4cf9a0b5357ed1e1e1f22bd1577296feaa07d29bb6927ce9ec1
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs social engineering tactics, presenting itself as a lure for 'free Minecraft Alts' or 'game hacks'. It contains links that redirect to known malicious infrastructure, specifically 'https://netcdn.online/app/479516143/free-minecraft-alts-game-hack'. The document also instructs the user to press Win+R or paste a command, a technique often used to bypass macro restrictions and execute arbitrary commands directly. While no scripts were explicitly extracted, the presence of embedded URLs and the social engineering lure strongly suggest an attempt to lead the user to a malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.online/app/479516143/free-minecraft-alts-game-hack In PDF document text
    • http://library.umla.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/claim-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51EC 25200 bytes
SHA-256: db06ba695f2b40873d1a0df1f980116a8b2b202b6964a7ceec64e1f05998eb99
font_01_sfnt_off00008a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7F 2892 bytes
SHA-256: e0a0e7499c3dd10c5114bd1538d6e258e6cb3acdd4f79d9538668087a4bdd2cc
font_02_sfnt_off00009467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9467 17644 bytes
SHA-256: 4350bb70586d7d356c834f80239bf16b03274066df9e9143be1036ee17eff588

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