Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b5ac08fe6c3818…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 11:11:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5c83f95f8ba355ddcbe1e6a207925347 SHA-1: aed65a535aac53d9a1891b4fef1e4fd0e28df841 SHA-256: a8b5ac08fe6c3818201f32d192a5314d7ec313c349e93921a253c0e21049e9c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The primary URL, http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-2021-game-hack, is identified as a malicious redirector. The document's content and the presence of multiple links to similar lure pages indicate a phishing or scam attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/how-to-hack-roblox-accounts-2021-game-hack In PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-robux-code-us_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/roblox-rhs-hack_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/roblox-free-hats_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-tiktok-views-trial_GM835599320.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/cheat-engine-bypass-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/free-robux-sites-v3rmillion_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/coinmaster_GM406889139.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-put-in-cheat-codes-on-roblox-hospital-tycoon_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://elearningman4kebumen.sch.id/__statics/gudangsoal/files/how-to-hack-epic-minigames-roblox_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_off00002b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B90 22440 bytes
SHA-256: dbda84b16b61ff343cac7ecc646ee184cc025d89bf9a010233fb391d7f662d7a
font_01_sfnt_off00005db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB0 19468 bytes
SHA-256: c059e5ce0b13cf3e98c6bfdb87126f354e1dae45520eeb333857e6d2b791b0b8

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