Malicious PDF — malware analysis report

Static analysis result for SHA-256 e146cc721a56d467…

MALICIOUS

PDF

53.2 KB Created: 2021-06-04 02:15:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e37d3cbe5833d63f20ac06f0e2b52303 SHA-1: 3440b8f089501126fe87f40a01f297bb06cd09f6 SHA-256: e146cc721a56d467a9f314c95c3ca266bbd9e7909c239c81cf64826b4f780ed8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them by promising free game currency or hacks. These links redirect to known malicious infrastructure, specifically a URL associated with a 'game hack' lure. The document's content and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

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/how-to-get-800-robux-for-free-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/minecraft-free-version-pc_GM479516143.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
stream_004_off000053a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A4 26804 bytes
SHA-256: 1da382ce91ea8a2c432f9c6098cfadacf9fbcfd5d12dedac760414a693d2f493
font_01_sfnt_off0000916f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916F 8376 bytes
SHA-256: 061a27b4d608dc836f0da6f5ae441d520cdaa2fe80e70f3de36c6ad0e5b2bd69
font_02_sfnt_off0000ac40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC40 18664 bytes
SHA-256: 6a64e7471bea66bf256778f320a62da21f5461e8ce3828893f1d9cd09bca5c64

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