Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbfeb8ebe4dc6035…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 15:56:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e3eedadab4c9cfb3551970261350468b SHA-1: 6bcece5c2d4944b0fefa4de9c117685c7cc54727 SHA-256: fbfeb8ebe4dc6035481e86bebee64c164e93aee72aa4690ea657f2eb15080393
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and heuristics indicate a social engineering tactic to trick users into visiting these URLs, likely leading to further malware downloads or phishing. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of malicious intent.

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.tw/app/479516143/how-to-download-minecraft-for-free-game-hack In PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/roblox-does-cheat-engine-get-you-banned_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/youtube-free-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/nuevo-hack-de-robux-2021-funicona_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-hack-someones-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/roblox-cheats-madcity_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • https://www.elearning.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_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_off000032a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A6 22916 bytes
SHA-256: 35c1ce990cd1bff6c77fb0903275f5aac8784b6e426058c499e823b230586ffc
font_01_sfnt_off00006571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6571 18576 bytes
SHA-256: e3e0edb3c7448f41ae1085d086fc24fe76238478cf5dfadd3828424851daaa4c

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