Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3275afa962b363…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 06:59:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: def3b2f37f70940350af14899eb2c696 SHA-1: e7f931057cd1775fee82f4880868015aa61fdd05 SHA-256: be3275afa962b363ae92a6efbd348ff6270a76ea573b4369472e7a8ced521e41
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector infrastructure, leading to a 'free Robux' lure. The ML classifier strongly indicated maliciousness, and the document body reinforces the lure by mentioning 'free Robux' and embedding URLs. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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/free-robux-com-real-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/its-free-roblox-logo_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/comment-hack-sur-roblox-admin_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/link-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hacker-n-1-of-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-spider-man-free_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-its-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-counter-blox-roblox-offensive-hacks-esp_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-free-gamepass-script-october-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-spins-coin-master-no-survey_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_off000030e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E5 22164 bytes
SHA-256: bcbe786cf17960acd4520ed8b31c353a931a3f7fa338b34060d8b6f30b197a57
font_01_sfnt_off00006243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6243 19052 bytes
SHA-256: bc7b269ccb6ae3a64d83fc270fb5f4e603085d94a09e100662dabde8c260ece0

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