Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6a0fa85748ad92…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 04:52:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a6c9e535386aafc29925b4958adf6b02 SHA-1: dddc13afe4c6ca523dbba34eaad7e00248a422a4 SHA-256: ef6a0fa85748ad92ab8d8d1ae1fc29a9a580b1677bda0fcd56373a6782132a7a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as game hacks and generators, which redirect to malicious infrastructure. The primary lure is a link promising a 'Roblox username change for free game hack'. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to potentially malicious sites, 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.co/app/431946152/how-to-change-your-roblox-username-for-free-game-hack In PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-money-in-roblox-bloxburg-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/how-to-use-cheat-engine-for-executing-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/can-i-get-free-money-on-roblox-adopt-me-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/hack-spray-paint-roblox-libary_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/5om-free-robux-bday_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/google-why-is-roblox-gettng-hacked_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/how-to-hack-through-walls-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/free-2021-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/hack-exploit-para-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/site-hack-roblox-sen-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/descarga-de-roblox-hackeado-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_off0000309c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309C 23080 bytes
SHA-256: 0ea172f4ac3cfe3be204b0a72f4332bea44651423a4f37da45ae27708a585fbc
font_01_sfnt_off00006498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6498 19540 bytes
SHA-256: 931b08b03ca54b31686306823cbaeb68bb9b2d4519394e74376e5a024d3c9af4

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