Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a592f2d4bcdbc1…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 13:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 46101995efe1af2e4f1f1b1830b17a08 SHA-1: 6c15fa56a0abde535567e946c26f425245fbce11 SHA-256: 68a592f2d4bcdbc195bf9598e6ab22dc665389114fbc1ce972d81b4e9386cd59
180 Risk Score

Malware Insights

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

The PDF contains multiple links to websites offering free game currency and hacks, such as 'robux-hacks-2021-game-hack'. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The document body and heuristics confirm the lure is related to game hacks and generators, aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • 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) or Microsoft license-boilerplate 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/robux-hacks-2021-game-hack In PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-free-vuilders-club-upgrade_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/cm-free-spins_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/username-and-password-roblox-free_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-cheat-codes-for-robux-2021_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/copy-and-past-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-roblox-accounts-with-robux_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_off000030a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A4 22364 bytes
SHA-256: 656f6e1a34bf3769ec2a045b021ef8d423e221ec0e77854189733046b3955cc9
font_01_sfnt_off000061fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FA 19124 bytes
SHA-256: 5acc4cb5eca619de91ddb47cdc70e87d550a63f617f877071c9ac47b9f2637f1

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