Malicious PDF — malware analysis report

Static analysis result for SHA-256 812db14d862288b3…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 21:06:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 97ef85fc4dbc234add1e0c8e2c9621b1 SHA-1: a99542b7c41dc6f58fdeed12e05a41fbae3c3ced SHA-256: 812db14d862288b3ecdd98ac48c9bf573ece29c9ac6a07897711277e9136effd
220 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or free currency generators. The primary link directs to a known malicious redirector infrastructure, suggesting a phishing or malware distribution workflow. The document body and heuristics indicate a focus on 'Coin Master' and 'Robux' related scams, likely aiming to exploit user interest in free in-game items.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/406889139/coin-master-hack-https-coinms-net-game-hack In PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/robux-tool-hack_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-no-verify-or-download_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-use-hacks-on-roblox-no-virus_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/june-29-coin-master-hack-no-human-verification_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_002_off00003429.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3429 22824 bytes
SHA-256: d813c48180ae88bef703ccfb41dedaad6efa9d14b62e58590357ddaf315d4b77
font_01_sfnt_off00006747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6747 18440 bytes
SHA-256: d4a0ce670d7ff27a0341fb2a5bc1c8134718dc63ae2ec70999bf7230e535e219

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