Malicious PDF — malware analysis report

Static analysis result for SHA-256 5988b8ff7574d230…

MALICIOUS

PDF

51.7 KB Created: 2021-06-09 11:57:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 94b37e272f54159aa231d46385b6b9b9 SHA-1: a6dc78c39939bde982d8947a1082e5ab7c1d9187 SHA-256: 5988b8ff7574d23068467ec2582d6c848e29ebd7db7474b6d8895463c5523770
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free generators. The document body and extracted URLs indicate a lure to trick users into visiting these sites, likely to download further malware or engage in phishing. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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.tw/app/431946152/hacks-fpr-roblox-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id/repository/games-on-roblox-that-vip-servers-are-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/roblox-script-kill-player-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-hacks-for-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000514c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514C 27236 bytes
SHA-256: b150c09d921fb168f19e868cfe3b4d833883b6eb05c1d521bcd8912d9a0fddf1
font_01_sfnt_off00008f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F76 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off00009932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9932 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA644 18524 bytes
SHA-256: a180ba14e9decc446da0e9fae1c03f9dc1854bbb6e464e5d92d83920a9b24c14

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