Malicious PDF — malware analysis report

Static analysis result for SHA-256 496b847be1ff8950…

MALICIOUS

PDF

33.2 KB Created: 2021-06-26 08:29:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b06d01b2e47e0f0912d71c6a3ade0a9a SHA-1: a4c2172b8a7062a2a18cb1f20b1616266a3808ac SHA-256: 496b847be1ff89508442d8e63c818b3b865a21b67a8e8f9738ffd3799137d98d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, specifically designed to lure users into downloading potentially unwanted or malicious content related to game hacks. The document body and heuristics indicate a phishing or scam attempt, likely to deliver a second-stage payload or lead the user to a credential harvesting site. No scripts were extracted from this sample, but the embedded URLs and redirector lures are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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-hack-no-downloading-games-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-characters-without-robux-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/https-webrobloxknife-simulatorcom-games-202120218-howtogetfreerobux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/mcpe-download_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-hack-me-com_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-admin-gui-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-commands-for-roblox-without-admin_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/guess-that-song-game-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-bubble-gum-privat-server_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/games-for-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pokemon-go-free-hack-download_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_off00002b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3A 21824 bytes
SHA-256: d9b3dcfb5f37ef7bdada7850b3e92bb6341955eb79c4ab3490a363bcf9b66f35
font_01_sfnt_off00005b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5B 19540 bytes
SHA-256: 5ae6461384e17f91bdc5332825be2741afe2fa799b950c9fffdf9ff58ffe45b6

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