Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee52a6f716180230…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 10:03:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1f34e3f161d11f59e01e48d94e3bdce6 SHA-1: 70515999b842cf70fed7e2d5b1e0fd56e6ad9170 SHA-256: ee52a6f7161802309d95dfb7bf1e04da1e88f42a3687b2a599a9349a63abb243
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a suspicious URL. The document body, though heavily obfuscated, contains references to the same URL. The presence of embedded URLs and the nature of the lure suggest an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/479516143/classic-minecraft-net-hacks-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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
stream_004_off00005240.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5240 29600 bytes
SHA-256: 506531b2f087ae33616fcff6cd882fb59a51e892f7076a540df32fe99e58aced
font_01_sfnt_off0000938b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x938B 17812 bytes
SHA-256: 06eb0692cb0ff670c8084f221f19fc536b6b0c4a84b00058b05a05adc7fae17c

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