Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2da9cbe8ac4d4e…

MALICIOUS

PDF

41.5 KB Created: 2021-05-12 11:17:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d7488acb23ed9e91b09dbbdae256bfe6 SHA-1: 77424b2e35a12efcce90a322cecb09365b2d75ea SHA-256: ae2da9cbe8ac4d4ed50f2fb2763aa42d8f5d641bae85c5cb3b251a8875c9a463
200 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'free generators' or 'game hacks'. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL. The presence of PDF-specific heuristics for malicious redirects and game hacks strongly indicates a social engineering attempt to trick the user into navigating to a malicious site, likely for malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-client-game-hack In PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/robux-generator-2021_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_off000049fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49FC 24680 bytes
SHA-256: d0bb1ca8ca80291c0dfd8782a0440462a4bceaa7c1915f19dcde6c3425bfd0ed
font_01_sfnt_off000081ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BA 17644 bytes
SHA-256: 927258bdbefef78dc40aaa8e845622660e86aca2ed1985192404f02e600f902e

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