Malicious PDF — malware analysis report

Static analysis result for SHA-256 9460150058178a39…

MALICIOUS

PDF

49.7 KB Created: 2021-05-11 07:36:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 58d54359416858db60769f802e68929b SHA-1: 948ad2fec282b4be6826c6194a147564db011a8c SHA-256: 9460150058178a392654497cea7e18341e1c646ae772080cac61a2a5c41eda59
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into executing further actions. While no scripts were directly extracted, the nature of the links and the fake CAPTCHA indicate a likely workflow of luring users to a site that may host further malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/how-do-i-get-robux-on-roblox-game-hack In PDF document text
    • https://library.um-sorong.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6A 26476 bytes
SHA-256: 1de94c2edb2eac1c01e1998c51bb4bc05761f5722f640e3b4d92b9032db0ca3f
font_01_sfnt_off000086fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FA 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000090a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90A6 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_03_sfnt_off00009f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F32 18360 bytes
SHA-256: 22a3ac7fd5a8e7ded2d491dbb667dc3ed9186f29057d67e789ef353447e020ef

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