Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7bb3ecbe1ea0b8…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 08:02:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3da7ad7ae960f5d2f320cb3990eedb22 SHA-1: e32b386597dfb52ae46cdd5ce1d77682afb72d84 SHA-256: 5e7bb3ecbe1ea0b86b293dda504b537aed316b12a6e6e19e8f4e067c6d20ede9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, disguised as a generator for game hacks. The ML classifier also flagged this PDF as malicious. The document body and embedded URLs suggest a lure for free game currency or hacks, which is a common social engineering tactic to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/lots-of-robux-game-hack In PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-likes-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-tiktok-likes-and-fans_GM835599320.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B1 25028 bytes
SHA-256: 786cb7b8f951778395406a196b734a5e35db5fe00a70da3cf446a40accea4e81
font_01_sfnt_off00008d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1E 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2F 17952 bytes
SHA-256: 15d841c4e586d0ad4ef984c3fe87cdc5c0f17f998b76c5925d27cfadcec23376

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