Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f6040c36fc6873…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 23:53:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6c07af9028648f5e2bafe9a5d5abd873 SHA-1: 0343cc61d097c416864276cccd875b6213e748a0 SHA-256: 10f6040c36fc6873a56f694aea6d324c53c844119b731f19152b2f3f1acfdaba
180 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and websites offering game hacks, indicative of a phishing or malware distribution lure. The document body explicitly mentions 'free minecraft account' and directs users to a URL that is flagged as a malicious redirector. While no scripts were directly extracted, the PDF structure and embedded links suggest exploitation of PDF vulnerabilities to redirect users to malicious sites, likely for credential harvesting or second-stage malware delivery.

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) 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/479516143/free-minecraft-account-game-hack In PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-hack-someone-on-roblox-on-a-phone_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/animation-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-vehicle-simulator-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-hack-apk-new-version_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-free-black-suit_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-kick-hack-fe_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-domino-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-roblox-accounts-nbc_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/noclip-roblox-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-avatar-free-boy_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/muffin-combat-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-roblox-logo-favor-bag_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_off0000312f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312F 22548 bytes
SHA-256: f66b96e723537363b135ad9db945520e96f0368ca6027adf3388a781570a86f0
font_01_sfnt_off0000637e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637E 18140 bytes
SHA-256: bf622982fa8c99a0d325c1609f31225d3bf40058dc9cd86c15c3e8f5bbc20de8

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