Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba0a92a89b253fe…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 03:13:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a5037a18146088e99d3ba3d85c20104a SHA-1: 0ffae10f7b67ab817e06aa8c48b8a7413ecb2b84 SHA-256: 4ba0a92a89b253fe6c2bc7fa4952e35ad0860c6cc7d6c8bacd8a7ee54a9797c9
160 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting game hacks and cheat codes. The heuristic firings confirm that the PDF links to known malicious redirectors and employs a lure for free generators. The document body, though partially corrupted, contains text related to 'cheat codes' and 'game hack', reinforcing the lure. The primary attack vector appears to be users being tricked into clicking these links, likely leading to further malware downloads or phishing attempts.

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.co/app/431946152/put-cheat-codes-roblox-bubblegum-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cheat-codes-for-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-account-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-free-roblox-update_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-assassin-roblox-coins_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-wall-design-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-wikia-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-face-girl-blushing_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-pants-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-apk-hacked-3526_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_off00002e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E26 22532 bytes
SHA-256: cb220bcaab0725686923ba32537b2e408638ee087d76b39cefe5bcce610c424f
font_01_sfnt_off00006075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 19484 bytes
SHA-256: 5e4a66428a3a13ff814ce0ad219e1b0946e3c45915e585f6707644230ff63649

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