Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7618a1b94f75fea…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 17:04:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ec4f9b4117da7cb829d3779bb4aa10e3 SHA-1: 05b8592871aed7cf8d5d363db23ba88ebad56977 SHA-256: f7618a1b94f75fea043beba274ffc4dfff72d0922b4272002110593d2708ac91
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites that offer game hacks and free currency, a common lure for phishing or malware distribution. The heuristic firings indicate that the document links to known malicious redirectors and uses an IP address directly in a URL, suggesting a high likelihood of malicious intent. The document body explicitly contains the URL 'http://netcdn.tw/app/431946152/how-to-get-free-robux-codes-game-hack', which is likely the primary destination for the lure.

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-codes-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/cool-kid-roblox-hacks_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/khaos-free-robuxcom_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/gamekit-didnt-give-me-free-800-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-promo-codes-that-give-you-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-glitch-2021-july_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-rs_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-rocitizens-cheat-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-bc-admin-leaks_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hacked-shirt-id_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-cheats-picture_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-apk-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-builders-club_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-roblox-accounts-on-phone-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_off000031dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DC 22044 bytes
SHA-256: 22951d84dc2842b33171dfa87bd75b0b1137e3f9c72d210b56d90d5fb5ceebdd
font_01_sfnt_off0000628c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628C 19156 bytes
SHA-256: d834416b7e9185468f589fe40c9632ebbdbdfe97c28f85986fef52e4c0b1d557

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