Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e5bd860ed61216…

MALICIOUS

PDF

49.0 KB Created: 2021-06-10 21:59:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 45a52a9d4e44f91095c3120d9d40dc9b SHA-1: 15897692ff9877814e3093aa87412a5264473f87 SHA-256: 37e5bd860ed6121652586ee098a156c728691f8f194595a4b183aaa50789c0b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure associated with 'free Robux' lures. The document body and embedded links suggest a social engineering attempt to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/free-robux-by-wtaching-ads-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51F5 26252 bytes
SHA-256: 206a07d17eb7ab5196cae73a6efbee9175a073d57df30067da666b0c5bb229f1
font_01_sfnt_off00008c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C01 4044 bytes
SHA-256: 128a41eedfaa63f72c3e235bfd047ffd9c0c88893f3dfb4870db0666a1a6e764
font_02_sfnt_off0000992c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992C 19472 bytes
SHA-256: 9c836e7350ef2c26f3b07b5d9915674f08ca5f23d12d543b9a10c3e236bfeaac

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