Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab50f5935666444…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 07:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 31b226edc322e0a97770fd1598f4a1f2 SHA-1: e25aa68ad727b3d9469873fb00be42bc602850d9 SHA-256: eab50f59356664446f20785eec6193fbf4d05557d804eeb31935e9e3fe7443f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to entice users. It contains multiple links to redirectors and other PDF files, some of which are known malicious infrastructure. The document body, though partially corrupted, contains references to 'Coin Master Hack Version' and URLs related to game exploits, reinforcing the lure. No scripts were extracted, but the embedded URLs and the nature of the lures suggest a phishing or redirection 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.tw/app/406889139/coin-master-hack-version-game-hack In PDF document text
    • http://library.gkigadingserpong.org/repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/funny-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-in-30-seconds_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/using-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-vip-server-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-roblox-like-a-boss_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-tokyo-ghoul_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-key-login-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/do-robux-generators-work_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
font_00_sfnt_off0000307b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307B 22436 bytes
SHA-256: 547e8485f212ec110be3079999702797ca082da948a9c65d6d0a4048784d64e8
font_01_sfnt_off00006274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6274 18140 bytes
SHA-256: 503563be678171a85d5e5a9d7aece18bf67972ce993f3ff3d264913f79314b46

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