Malicious PDF — malware analysis report

Static analysis result for SHA-256 be22448d89887432…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 21:30:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f3bf52953bdf1304927020c65c78a9b SHA-1: 1a39d52bba62c89ad845a002b25d5b6d7b998664 SHA-256: be22448d89887432c69836d9566dba77b64dec041f3cb3c19d544e7a5f8c207d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to malicious redirectors and IP addresses, disguised as game hacks and cheats. The presence of a fake CAPTCHA heuristic indicates a social engineering attempt to trick the user into interacting with the malicious content. The document body and extracted URLs strongly suggest a lure for malware distribution or phishing, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/406889139/coin-master-hack-pro-gamers-game-hack In PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-hacks-on-roblox_GM431946152.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/como-hackear-juego-coin-master_GM406889139.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
stream_003_off00004da0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DA0 24492 bytes
SHA-256: 106411359c2516810e123115147417aea53f5b411d1526d12168c79ca1a8e09e
font_01_sfnt_off0000859f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859F 18132 bytes
SHA-256: 7c3ba000fcc9e82367a9cf09e7428e48624a936725f215f3086fe1b405a0b7f2

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