Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1f41b7b893064d…

MALICIOUS

PDF

36.8 KB Created: 2021-07-01 16:14:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b747514256306f93d15476e9187f04c2 SHA-1: fe82a9fa93a4cb1cfb11a883ba2e6cf087816063 SHA-256: 0d1f41b7b893064dfbf17a790fa560c42230b44e3ca7c5c9ad62353a5bb003cc
160 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The primary lure is a 'free generator / game hack' which leads to the URL http://netcdn.co/app/406889139/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to exploit user interest in game cheats to deliver a malicious payload, likely via a drive-by download or a further phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/406889139/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/dday-hack-script-roblox-v3rmillion_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/can-u-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hacks-to-get-money-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/master-coins-free_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hack-exploit-roblox-download_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/raindrop-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-spins-on-coin-master-2021_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
font_00_sfnt_off00003676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3676 22856 bytes
SHA-256: 0af6180a8b35a84118a2b12d66e39e40aff10e5c25e98f481b48b498afb16a07
font_01_sfnt_off000069b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B1 19440 bytes
SHA-256: cca4c96481a320e7574bcec08d1a26c16229fe4eaa1c63123c5c1a79d70adda2

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