Malicious PDF — malware analysis report

Static analysis result for SHA-256 815c5055ceda5964…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 06:17:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e5f812b0684000a23c5f0900c289152b SHA-1: b2e5000e272e2865b0de4c440e8e458b8087ac76 SHA-256: 815c5055ceda59641bc2edcc69789413056597069459d82a8b7f517593c1041a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to a malicious redirector, specifically advertising game hacks and free currency generators for popular games like Minecraft and Roblox. The ML classifier and heuristic firings strongly indicate malicious intent, likely to deliver a second-stage payload or phish for credentials. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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.co/app/479516143/minecraft-pe-hack-client-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/when-will-bloxburg-on-roblox-be-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-walkspeed-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/clothes-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/google-sites-roblox-hack-online_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-stuff-on-roblox-android_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/give-me-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-2021-real-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-jump-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-a-free-skin-noob-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hacking-brothers-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-cool-outfits_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-promo-codes-real_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3225 22008 bytes
SHA-256: d7deb89d7ced940d48fd325c7648cba432d564f1b9a2b28149797b71944eafaf
font_01_sfnt_off000062cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CB 18252 bytes
SHA-256: 122aa68ffc89b9c803021f6a0620f6a9c346e7f6f316835da50b547eae956915

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