Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddc06d4b3447d23…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 12:59:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a3ceded115fe2ee6db475daf4da017f8 SHA-1: dc533dec5bc11cf0704c8ab65a8138e47ec131e7 SHA-256: 3ddc06d4b3447d23e64d35ca51d7b26b58dea6a0abc0ada64f12ff68b4f18b3b
220 Risk Score

Malware Insights

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

The PDF document contains numerous links designed to lure users into downloading "hacks" or "cheats" for popular games. These links redirect to malicious infrastructure, indicating a phishing or malware distribution attempt. The presence of multiple redirector links and the ML classifier output strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/flame-gg-free-robux-game-hack In PDF document text
    • http://razredna-nastava.net/files/roblox-fallen-hacks_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-pet-dog-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-scripting-free-help_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-oprewards-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-configuration-roblox-robuxian_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-jailbreak-telport-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-skin-tutorial-roblox-strucid_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3192 22572 bytes
SHA-256: 32a5cfcfeb44d52e57f900e8cee0e15b1c7cfc791944038e7a43ddec8909f788
font_01_sfnt_off00006419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6419 19052 bytes
SHA-256: 0e5acbd67c2151e2d8a0f290c50b75584f3082951c962a1c817502256c0c0098

Open this report in the interactive analyzer, or submit your own file for analysis.