Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1881f8bc4affa18…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 13:55:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1e33cb9b0dc144cfbc80497460797d7d SHA-1: 40686dbc1ebc3ec6d17ef47c737ea1391693f4fd SHA-256: a1881f8bc4affa1898dc52002340944f648d6238696a28d20838dfc13da93bcb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to a known malicious redirector. The embedded URL is designed to trick users into clicking through to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attempt.

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/431946152/how-to-get-free-robux-without-verification-or-surveys-game-hack In PDF document text
    • http://lib-smansumsel.sch.id/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://lib-smansumsel.sch.id/repository/free-robux-no-human-verify_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
stream_004_off00005325.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5325 24976 bytes
SHA-256: 2734044b168ee676d81c825d5495e3ba915922a4ed7a2b73dbf621a8664c546c
font_01_sfnt_off00008cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD8 19424 bytes
SHA-256: 30551668946d9b3d80fdd5a427c07e5f2c52faec585ae3c44dbbbd4d67cc7463

Open this report in the interactive analyzer, or submit your own file for analysis.