Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f17cfe591372eb7…

MALICIOUS

PDF

33.0 KB Created: 2021-07-05 18:53:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4fbac6ff044e04b18b54365eacde1ea2 SHA-1: 03b8f6d9378d9b44cdd393d674be8eeb29978b31 SHA-256: 7f17cfe591372eb7dbf7b93a498b9d485d12d1aee84e4376fade0dfd80360310
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and other potentially malicious PDF files, all related to game hacks and free in-game currency. The document body explicitly mentions 'Robux Generator' and includes a call to action to click for access. The heuristics indicate the PDF links to a malicious redirector infrastructure, likely serving as a lure for users seeking free game items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/431946152/how-to-get-free-robux-promo-codes-game-hack In PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-codes-2021-june_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-cheat-robux-download_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-free-robux-download_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-30-days-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-hack-roblox-2021-easy_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-robux-free-bc_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-game-card-pin-free_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/http-wwwrobux-hack_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_off000029be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29BE 22132 bytes
SHA-256: 61c7794bc05d456a7012ae735535ea4ad9db6dddcfcd68eeb0eeaaf8fc2d763c
font_01_sfnt_off00005a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8E 19572 bytes
SHA-256: 0dadee5e3cc3b2abbaca990777016bf93155e721bdd32ff7d925edbe6cadea8f

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