Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27f267f81ae7a25…

MALICIOUS

PDF

41.8 KB Created: 2021-05-10 18:06:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7ef95876f7a55c63366c6039127d2ff1 SHA-1: bc8f63d5b13a42007fc7bf139c13dbf78988523e SHA-256: c27f267f81ae7a254f1eb791060930b4a67c9de35a559f3acae036c3b8c14108
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors and phishing sites, masquerading as game hacks and free currency generators. The document body and embedded URLs strongly suggest a lure for users seeking in-game advantages, leading them to potentially malicious infrastructure. The ML classifier also flagged this document with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-spins-coin-master-unlimited-game-hack In PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/more-robux_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/minecraft-apk-download-free-11-055_GM479516143.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_off00004938.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4938 24264 bytes
SHA-256: 37de3e5ec34f78b3f2f9198a00b10f9cf837994cf5251c0cdebfbf3e7ce7d8e6
font_01_sfnt_off0000803e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x803E 18580 bytes
SHA-256: 8aad0f2405ec9a3272b05944b48a23572f7af0293916013bea6eee8874d320e7

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