Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f498a0b7064490…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 17:20:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3dd69ac6449c4bc766724a12bded734e SHA-1: f9621cdbcba94128a15789aa90928ef83cee125f SHA-256: b6f498a0b70644902d59adcfc60406e6506df79cb3947cb554a643a879ae7ea1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'game hacks' or 'free generators'. The primary lure appears to be related to Minecraft and Roblox, aiming to trick users into clicking through to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an intent to redirect users to external resources, likely for malware delivery or phishing.

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/479516143/how-to-start-a-minecraft-server-for-free-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/ben-10-universal-showdown-cheats-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-5-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hacks-for-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-dll_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-maniac-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/bird-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-sword-fighting-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/are-any-of-the-free-robux-things-legit_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-unlimited-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-20210-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-stuff-on-roblox-2021-on-phone_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/preguntas-y-respuestas-roblox-robux-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-pet-snacks_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_off000030ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AE 22124 bytes
SHA-256: b5038ac519a090963827d769a9e8d8df860abfd0e1d1662eddb0c67e75308b30
font_01_sfnt_off0000615b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615B 18276 bytes
SHA-256: 5b06d09b2e4d23638ce6d3b7da2950f972f4b341437fc5afd30f64d4b098dc56

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