Malicious PDF — malware analysis report

Static analysis result for SHA-256 122967e39827173f…

MALICIOUS

PDF

36.1 KB Created: 2021-07-06 06:34:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 229eb2f5e9771b06c5b07526116f2021 SHA-1: 6eaf3eb62b7834e5ddbf450827c206d96909e15e SHA-256: 122967e39827173f32d3ced88ce9660311e3999bcadb4bfc16d42869ca3afab3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" and "free generators". The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the infrastructure. While no scripts were extracted, the embedded links and the lure content strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/hack-coin-master-without-human-verification-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-hack-android-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-items-on-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-pc-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-you-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-veil-hack-update_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/2021-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-is-going-to-be-hacked-march-18th_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-promocodes-roblox_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_off000033cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33CD 23480 bytes
SHA-256: 4f9d988bfe6033262216361af6cb306970ebe6ff6a4ff3cb55492e9e3cc86b25
font_01_sfnt_off000068ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AE 18904 bytes
SHA-256: 082fc6b2b71f7ea5548029beb597447fa73794cbf09ea5a46efd6265d0e30084

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