Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a47323d3d0326a1…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 22:27:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1b754cafaa4f92148877bce5e0513951 SHA-1: de58aca1869ba37a1cfbf39546e0c293d13a878f SHA-256: 4a47323d3d0326a1f1d9a738df42a24eb2a370f9bdad6c051abd3041299b9cf9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary redirect URL is https://netcdn.online/app/431946152/roblox-trolling-game-hack, which likely serves as a gateway to further malicious content or phishing pages. The presence of a visual download button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-trolling-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/rbxdemon_GM431946152.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_004_off00005076.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5076 25140 bytes
SHA-256: 3a26d945f78e616636178eed480c6ce485697af826d5175cd30e2c6dbad1a9ac
font_01_sfnt_off00008a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A44 18192 bytes
SHA-256: 71604384ebc4a394942ac25074e396c0ebb11f2a88b51d5532127cac238e2fd8

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