Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3db7d00c58060c9…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 14:00:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9e74a41c39425a22c93db9c16160f1c5 SHA-1: cea4e1d52d16d2330085964a614de58d2bb860c1 SHA-256: a3db7d00c58060c98d775a43c41f8091d57f045f4c660e885db809b624dd7a10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' and 'hacks' for popular games. These links likely lead to further malicious content or exploit kits. The document body and heuristics strongly indicate a lure-based attack aiming to trick users into visiting compromised sites.

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/431946152/roblox-arsenal-hack-script-money-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/robux-hack-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-account-passwords-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/tiktok-free-bot_GM835599320.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/brown-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-top-model-cheats_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.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_off00002e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E56 22440 bytes
SHA-256: 1c55555a3917b0f05141835d8b0ec4b8990aaea27979558ee57ca93ed17cbdce
font_01_sfnt_off00006056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 19432 bytes
SHA-256: 81e007c14efc671a7c6788c7a0f0b16d5a4160d11725489c4c78c2851358b1ba

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