Malicious PDF — malware analysis report

Static analysis result for SHA-256 331162661de78d82…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 02:14:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c8ce5bb160d256947576b047a6fa456a SHA-1: b6c2c6eb16429a2f590b823a85f94f27c91adac9 SHA-256: 331162661de78d8297c1b2819045912b2e9e78d2f7403898f83d1d8152249da6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and cheats to entice users into clicking malicious links. The embedded URLs, including http://netcdn.tw/app/406889139/archery-master-3d-hack-unlimited-coins-cheats-game-hack, are identified as belonging to known malicious redirector infrastructure. The document's content and heuristic firings strongly suggest a phishing or scam campaign aimed at driving traffic to potentially harmful sites.

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/406889139/archery-master-3d-hack-unlimited-coins-cheats-game-hack In PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/learn-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/greenville-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-dominus-roblox-hack_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/change-stat-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-shades-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-comrobloxplay-now-for-free_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-accounts-2021-june_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-gta-car-game-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id//repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-more-robux-using-cheat-engine_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/roblox-build-a-boat-for-treasure-cheats_GM431946152.pdfIn PDF document text
    • https://katalog.smkn1glagah.sch.id/repository/how-to-hack-roblox-to-get-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_off00003219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3219 22292 bytes
SHA-256: 0a6684efc6c1af6724414926c20d7498be772b2c0944a755a99665051f9fe57f
font_01_sfnt_off00006391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6391 19384 bytes
SHA-256: 6d80dce4fa699b9076a8b175d16ed475ccfb6ff0dc0169280df9c553a7f08f53

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