Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72513879683ce07…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 01:53:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 321477aedb995bf24c876c9f3224b935 SHA-1: d669840ddd20f77e018bd6bd4c912717b5374580 SHA-256: f72513879683ce074d875cd7d0d6c9f6eb3ecfb7418b5c050c37dc4b8e053a04
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and free item generators for popular games like Roblox and Minecraft. The document body and embedded URLs strongly suggest a lure to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to identify the malicious intent.

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-free-clothes-generator-game-hack In PDF document text
    • https://razredna-nastava.net/files/roblox-how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-admin-comand_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hack-para-cs-go-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/awesome-roblox-outfits-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/hack-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-jeruhmi-roblox_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robux-rewards_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/gary-s-hod-infinite-life-hack-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/hey-google-how-do-you-get-free-robux_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_off00002f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F31 22956 bytes
SHA-256: 0c12e60b81e451c5f1169663e2ce502e1b68682ff06eff77b330daafe5f1cb3a
font_01_sfnt_off0000627d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627D 18920 bytes
SHA-256: 168b44f383469b980ccfd12afc6a57c15e96a954b5575884cb06f059eb884acb

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