Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6d5da023435b6c…

MALICIOUS

PDF

35.9 KB Created: 2021-06-28 06:57:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 21aeeaad81a853d2061dca980e10b351 SHA-1: 815233fdd195c7fa372597402af3bef1653f04b5 SHA-256: 7d6d5da023435b6c7d61b89c05be64dc4ca05c97396c797440bbfc3adb191ff1
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure tactics.

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.co/app/431946152/free-robux-card-generator-no-human-verification-or-survey-game-hack In PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/generator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/roblox-hack-999999-robux-pc_GM431946152.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/esp-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/speed-roblox-hack-mac_GM431946152.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/roblox-jailbreak-hack-mac_GM431946152.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/pubg-uc-and-rp_GM1330123889.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_002_off000031ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31ED 22700 bytes
SHA-256: 781616fd2fdf6c4455ac4f905bf7978719f726c3cdac6a10b5f34c3a6ec2dbc8
font_01_sfnt_off000064f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F6 19800 bytes
SHA-256: 15533d196a545a81e430f90a78b568ec1cc80d0733250ce1bc9b71b37bc115b6

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