Malicious PDF — malware analysis report

Static analysis result for SHA-256 06581a1f80315e13…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 12:34:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 44ba2efd6f05a528e9e866de75808cba SHA-1: 6b00e5e50333821fb30fd9e1e0e874a8cc4d0540 SHA-256: 06581a1f80315e130dd3f11f7a28123e3ff657004a173ebfaf3f7e8250c54d7a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game hack lures, aiming to trick users into visiting potentially harmful websites. The document body and heuristics indicate a fake CAPTCHA or human verification prompt, a common tactic to encourage users to click malicious links. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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
  • 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/how-to-scam-on-roblox-game-hack In PDF document text
    • http://abqwinair.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://abqwinair.com/images/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://abqwinair.com/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://abqwinair.com/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://abqwinair.com/images/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://abqwinair.com/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://abqwinair.com/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://abqwinair.com/images/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://abqwinair.com/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://abqwinair.com/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://abqwinair.com/images/free-redeem-code-for-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_off00004638.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4638 26300 bytes
SHA-256: 8218a35027c1c21a43d6674fc0d786d7067def79f6f261f819afdc8e91a01846
font_01_sfnt_off00008415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8415 18436 bytes
SHA-256: 34f93b6f39f5197ad83579d8861054fdfd3ef28e5805cfd87bb9002912825c3f

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