Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7161b60fd8050f…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 08:48:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9564f8fc8db08d31957cb3d6d0729164 SHA-1: 095501f570debb2f406437a2b69b22b09986dbb6 SHA-256: 0d7161b60fd8050f17b0d290a1c1016e834a62fe5f5f3883f53411c913fa01c6
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with a primary URL pointing to a 'free generator / game hack' lure. This suggests a social engineering tactic to entice users to click through to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, but the embedded links are the primary vector for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/minecraft-free-android-game-hack PDF link annotation
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-treelands-free-uncopylock_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-advertisement_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/gift-card-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-tiktok-followers_GM835599320.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_off00003385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3385 23036 bytes
SHA-256: 321862111e41e834477233fcce7318e2eef1c565002edd0b2d50e0287bb9f198
font_01_sfnt_off00006684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 18172 bytes
SHA-256: 76a46b6ffa672d4629705b025ed1d2900a12de91bcde6df1b9c7209dc48d6afd

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