Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7723f779ffbd5b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-30 03:42:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: c6105eee4c96eadc337a17c5db5b0b4f SHA-1: 817ccc51ddb0ce465fbcf06684261acf80de20b5 SHA-256: da7723f779ffbd5ba17dbb70804e0099b8743c307214a120b140a7b0bdd1e158
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further malicious PDFs. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam campaign.

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.co/app/431946152/roblox-royale-high-cheats-2021-game-hack In PDF document text
    • http://digilib.stimlog.ac.id/repository/instalar-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-no-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/shirt-template-roblox-download-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-lucky-block-battlegrounds-cheats_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/abs-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/lootbux-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-an-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-use-roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-groups-that-give-you-free-robux-every-day_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/pokemon-go-free-64-bit_GM1094591345.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_off00003067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3067 22336 bytes
SHA-256: cbac05ed7525c4aa56f696d08268cf1bca47aa49f153c173981af72304f3369e
font_01_sfnt_off000061fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 19460 bytes
SHA-256: bf297adfe1bebcfdddacd095f15a7e21c68fedb6eaae9277df50982858cb91f6

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