Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e6047f93617c6d…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 21:10:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 874d56964ca081b5a4ce7253d8393d47 SHA-1: 97042864114cd554f1b8dc8ca6fd4f14147fe34a SHA-256: a9e6047f93617c6d9fc6b3ad6f249debe01ca9ef48f483ebb40a91d73b16cc05
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs that promise free in-game items or currency, acting as a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent. Although no scripts were directly extracted, the document's structure and content suggest it is designed to facilitate the download of a second-stage payload.

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/406889139/free-pet-food-for-coin-master-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/www-robux-tv-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-limitless-free-robux-unpatched_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-infinite-ammo-hack-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-toys-codes-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/back-free-items-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/descargar-roblox-hackeado-para-android-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/can-you-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/youtube-free-robux-legit_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pubg-uc-qiymtlri_GM1330123889.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-shirts-free-girl_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/774-hack-roblox-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_off000036ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36AC 23312 bytes
SHA-256: a9e29ec6cdc2865696e656f15225ef1fa912fb45b9d2c35e757730ff141cefa8
font_01_sfnt_off00006b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B69 18324 bytes
SHA-256: a7c92b5cd33abe01afb42c60a8dc822ff1d4f8d31c8a3da7d6ded022ad377780

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