Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3ffd1b9d1a3c86…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 06:18:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9fe4a45c6d8d6c6b5308d173d862884b SHA-1: 5ae0a50eb0dd44eb98d3876c788fb59e407cdb27 SHA-256: 8e3ffd1b9d1a3c86de074232e7ed1672709916a5d5f3996379af2c1c9578751f
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a redirector lure, specifically linking to a 'free generator / game hack'. The document body and embedded URLs reinforce this by mentioning game-related terms and pointing to the same redirector. This indicates a social engineering attempt to trick users into visiting malicious sites, likely for further exploitation or malware delivery.

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/minecraft-for-ipad-free-game-hack In PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/roblox-promo-codes-2021-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/free-roblox-card-codes-july-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/hacks-fro-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id//repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://perpus.poltekkes-tanjungpinang.ac.id/repository/coin-master-daily-rewards_GM406889139.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_off000032be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32BE 22340 bytes
SHA-256: 8a94eb2c745b4d2f80db7a5145b6f6289cbb2681bd0014d02874d7033127b247
font_01_sfnt_off0000642e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642E 18348 bytes
SHA-256: 77fda35481488166b96b2314590ed1bd84082cd679e1d5b9431d2b2ae4521319

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