Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1d9fbba9152b4a…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 12:47:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1da4445e25b5b75122fadcabad485c63 SHA-1: b8dcb944ff44f12951548f40bba71a05507fefc2 SHA-256: 7b1d9fbba9152b4ac5ba1e8532f7f2837363accab7121a30fa8d8fb409eb6c3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector URL, which is flagged as malicious infrastructure. The document body and embedded URLs suggest a lure for 'game hacks' or 'free spins', a common social engineering tactic. The presence of embedded URLs and the nature of the lure indicate an attempt to direct the user to malicious content, likely for financial gain or further compromise.

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/coin-master-free-spins-daily-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-20-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-bc-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/any-free-roblox-exploits-2021-reddit_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-game-free-demo_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/where-do-you-put-cheats-codes-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-100-not-fake-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/erased-citizen-roblox-hack-how_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/descargar-hack-roblox-funcional_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/can-you-give-me-robux_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_off000031ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AB 22464 bytes
SHA-256: 41fc85456bbc9321ee1f675551a04833e699e3616a9cc00ee119cdd240e3e9ca
font_01_sfnt_off00006393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 18596 bytes
SHA-256: 9b8358e598e07f7d28a63a566b047adfcbccaa59c97f3816d59e3cdcc62e8d14

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