Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac1a53f1e45ec006…

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 14:41:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d064ce6e9ae0cf5a6f1667084e8f0b95 SHA-1: d4696a1cbf8365d629cbe71aaa100d7e620a9ecd SHA-256: ac1a53f1e45ec0069f0b63606f4348a7610d107b3eedd7a0412d119ad829f86a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting "game hacks" and "free spins". The document body and extracted URLs reinforce this lure, suggesting an attempt to trick users into visiting malicious sites. While no scripts were directly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attack.

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.online/app/406889139/how-do-i-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://library.atim.ac.id/repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-robux-hack-pc-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_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
stream_004_off000050df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50DF 30896 bytes
SHA-256: 0da2a430fb15f9b5a9b07420b3a3f2ad2ef978624a4ef74e85a9d227c6c1a033
font_01_sfnt_off00009066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9066 2820 bytes
SHA-256: e5f6ec650849eefe6bc6a1649c2875ce35328d23e4196945bba66cc43e5a49d4
font_02_sfnt_off00009a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A04 18216 bytes
SHA-256: 7b3dc5054b0587ec41e602859ac4e59ac97ec46c9406b1b4182074b4d7a08153

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