Malicious PDF — malware analysis report

Static analysis result for SHA-256 af72e8cf0a852a73…

MALICIOUS

PDF

33.8 KB Created: 2021-06-26 23:18:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b92e42b1646ec9ebdea813c4d525d542 SHA-1: 6a2e8de3c818e5d29812923041d5c31cffd65c3a SHA-256: af72e8cf0a852a7338ead286024eb10b8a4b9c62e87ae52dffc65d4133c4f55b
200 Risk Score

Malware Insights

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

The PDF document contains links to game hack generators and free item lures, which redirect to known malicious infrastructure. It also displays a fake CAPTCHA, likely to trick users into executing further malicious actions or downloading additional payloads. The embedded URLs and the nature of the lures suggest a phishing or social engineering attack aimed at tricking users into compromising their accounts or downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-prison-life-hack-pastebin-game-hack In PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-cute-royale-high-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-how-to-get-offsale-items-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/rbxoffers-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-minecraft-in-roblox-and-more-naval-ships-minecraft_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-change-your-roblox-password-when-you-are-hacked_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/make-free-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_off00002eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB6 21880 bytes
SHA-256: ea7ff688b679d2e121ac806bb334c9196c4877104cba73c48ff82293a5a03ad4
font_01_sfnt_off00005f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F05 19032 bytes
SHA-256: 99e7e6fba60363a6e1731b4e2d2836be46df85c9c419bf5a55ce1f4b601f54c5

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