Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d50e075200e2acd…

MALICIOUS

PDF

43.7 KB Created: 2021-06-08 15:22:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 32c4ee23b7210789c3dcc9a199661e5d SHA-1: 8749ce885b5a221ad4a873a7f677aa9d2f612328 SHA-256: 0d50e075200e2acd83fcee45af9d57fb22ea82b5297a065951f180c336f398a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The document body, though partially corrupted, contains text related to these lures and embedded URLs. The primary malicious activity observed is the redirection to potentially harmful websites designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-roblox-cards-no-scam-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-games-in-roblox-on-ios_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-codes_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_off00004f4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4E 24380 bytes
SHA-256: 0515fa55971c86e04f6710e247d6d9b93c0a40a5e15e66a84721e627d69c5f09
font_01_sfnt_off00008712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8712 18612 bytes
SHA-256: 4e30a4ea5c1d591865facbba22134e6a4ab90d01e4bb8bf3e6856c4680bcefab

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