Malicious PDF — malware analysis report

Static analysis result for SHA-256 3260ef83b184101f…

MALICIOUS

PDF

51.8 KB Created: 2021-06-07 07:32:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 80c322dcea4b60be02606fc712fd02dd SHA-1: 1406511da81ecd73596319c28767c0d1d02ce6c4 SHA-256: 3260ef83b184101f000553cb9d94d492966c59335d8152737cf3ed76167be287
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector disguised as a game hack generator. The ML classifier also flagged this PDF as malicious. The embedded URL points to a site that likely hosts further malicious content or exploits, aiming to trick users into clicking through.

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/bubbatron11-roblox-hacker-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/earnrobux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/tiktok-free-recharge_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/tiktok-free-hulu-account_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/pubg-uc-nasl-alnr_GM1330123889.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.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
font_00_sfnt_off00004faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAF 26552 bytes
SHA-256: 996758f4268897b62d994e112a055f37b339442ada676293ebe4400bb63765b4
font_01_sfnt_off00008d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D12 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000099b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B5 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C6 18532 bytes
SHA-256: b089fe80e7cc955a32b137cef09e0be940ba30623eeca18849f0d87aa841b611

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