Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab0f710e05ab719…

MALICIOUS

PDF

46.5 KB Created: 2021-06-03 13:25:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ed84cd23b659f6eadacb5f3feea103ca SHA-1: 3221163a2879359a2fa0a00347734d03a77a986f SHA-256: 7ab0f710e05ab7194c89cf28a62d7c32c110135e9c854a10eb2d958f6b593d6d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The document body, though partially corrupted, contains a URL that matches the heuristic findings. The primary lure appears to be a fake generator for games like Coin Master, directing users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/406889139/games-like-coin-master-for-free-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-ban_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D2 24536 bytes
SHA-256: 4daca98ad329cc16b849afd0f4bb84b85f5a74515b8c517cfa0ff4204fa4791d
font_01_sfnt_off000088f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F1 3060 bytes
SHA-256: bc7fc377927a31d8caeb6c92d1a531a1232c19653277374d06845b839816d0d7
font_02_sfnt_off0000938a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x938A 18140 bytes
SHA-256: 9434a788ff50f2eb68b1bd28075b357801e0b7561df8489df8f6a6f67a5d199f

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