Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1003d3e5729721…

MALICIOUS

PDF

44.4 KB Created: 2021-05-11 06:05:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: de7f9e0a5ee47912dc4b1e9bf54f8df6 SHA-1: d00efd0e212496f85edba0afce2fd25ada5658d2 SHA-256: cc1003d3e5729721d26f018a9483214c1937ec5f3176c6f1d209dcf19d95f579
200 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free Robux' or 'game hacks' to direct users to malicious websites. The document contains multiple links to redirectors and IP addresses hosting further PDF lures, indicating a multi-stage phishing or scam campaign. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/apps-for-free-robux-game-hack In PDF document text
    • http://183.91.70.7/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfPDF link annotation
    • http://183.91.70.7//repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/get-gold-coin-master-village-hack_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_off0000499b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x499B 29172 bytes
SHA-256: 5337887c4b2253f734cc02d58e33b00c60c26a5f94926011819290cf92cafc9a
font_01_sfnt_off00008bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB4 18192 bytes
SHA-256: b6bed13222f637b3eaa93fd3412fcfb5f097d091c9d6b8306e759aa57a7fe68b

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