Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8e9e4769317557…

MALICIOUS

PDF

36.9 KB Created: 2021-07-04 14:58:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3ff28d3b02584ad112aeed2abcad8592 SHA-1: 1d03aa59983b28af1d7a3402cfad8b3285a062c1 SHA-256: ce8e9e4769317557890a7326303fa2880f85e4b38b0b460d6ffe44291b4f5281
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for free game currency, directing users to a known malicious redirector URL. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the nature of the lure suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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.tw/app/431946152/how-to-get-free-robux-without-download-apps-or-survey-game-hack In PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-get-your-roblox-account-back-from-a-hacker_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/how-to-hack-the-northern-frontier-roblox_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/pokemon-go-free-kanto-ticket_GM1094591345.pdfIn PDF document text
    • https://elerning.ubkman1lampungtimur.com/__statics/gudangsoal/files/free-spins-coin-master-links_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_off00003526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3526 22668 bytes
SHA-256: a83ca2cda034a03e23b8e20a7f074334304ee806642d72e1e23c879b44fcc4b1
font_01_sfnt_off00006779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6779 20352 bytes
SHA-256: d8756e6af156b5e47b0cb2729479c2858110a61e10a0d8d2ed7f250617cb02ae

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