Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24496f3cbf7fb2e…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 03:48:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ad64963e1a97c37b352e07a159b2a085 SHA-1: 571086f6220af54be46ea74ece6b0a8a5af6255e SHA-256: a24496f3cbf7fb2e461c2837597a932e4999cc3ed4f01d01da8d5ee4c32b07c4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising "free generator / game hack" lures. The primary URL identified is https://netcdn.online/app/431946152/roblox-online-generator-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to malicious websites. The document body, though partially corrupted, contains references to the lure and the malicious URL.

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-online-generator-free-robux-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-gold_GM1094591345.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/wahoo-gaming-co-free-robux_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
font_00_sfnt_off000050db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DB 25184 bytes
SHA-256: 8ec934a17e43de68f9267261422320b40f2ca3fc122359bf5e8e63e67630d128
font_01_sfnt_off00008ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE4 18540 bytes
SHA-256: e7e0d8224686d11a11f5467174ef8b7d6b510e177a895953ff15dc68a9f544f2

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