Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba803fac6825a10…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 15:16:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e39ae50ca594f1f312f1ff328d82bc9f SHA-1: 69e23624ded6fcdb108457a099f4d426132d32e1 SHA-256: 8ba803fac6825a10024b5c0df9cf8d8f7b68b21750853b56d7d8b37999f93602
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free in-game items. The primary malicious URL identified is http://netcdn.tw/app/406889139/100-free-coin-master-spins-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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/406889139/100-free-coin-master-spins-game-hack In PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/hack-roblox-with-edit-this-cookie_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-hacks-for-roblox-work_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/hacker-prison-life-roblox-2021-pc_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/roblox-how-to-get-free-obc_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-stuff-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/hack-list-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/20212021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/check-cashed-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-cheat_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-no-survey_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_002_off00002fa8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA8 23072 bytes
SHA-256: 5e624a05a6b34bc7763a6fc6857421f9afdae98051a65595373600450854e695
font_01_sfnt_off0000639b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639B 18452 bytes
SHA-256: 707739985df39afd660eea59fce54b8e542272332a8fd4aad1d1100e7e0fc553