Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b55775b0139593…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 06:35:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1cc1a9028d7d079fc8c17c93f251da72 SHA-1: 7efa4c789e329f9e522f62f123915668196415f8 SHA-256: 61b55775b0139593b16cb24c8aeda6617a876f5c31c2fe48f0e47fbf767806af
180 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and game hack lures, indicating an attempt to trick users into visiting potentially harmful websites. The presence of a visual download button and callback lure further supports a social engineering attack pattern. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to lead the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/roblox-free-executor-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/100-free-spins-coin-master_GM406889139.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_004_off00005328.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5328 26624 bytes
SHA-256: 2c44d21b9b8d33560d04db87e72a8a2623fffd3e2a39de153340e598d39b3074
font_01_sfnt_off00008f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2E 18192 bytes
SHA-256: 7ba247a64e9cc24d80440ed01eefe46d1337aad9cec78f28e7b2b5b32c9414c4

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