Malicious PDF — malware analysis report

Static analysis result for SHA-256 580cbea9f27a55a7…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 12:42:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 45d30ac2915cadbdd5d5add72cda7bf1 SHA-1: 3d52624340bacccd1633d05f7d6db4c78038d32a SHA-256: 580cbea9f27a55a7b058f517a56837d0bacf73a478e5a21c76ce6510017a9bc1
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a malicious redirector link disguised as a 'free generator / game hack' and presents a fake CAPTCHA to trick the user into clicking it. The ML classifier and specific heuristics strongly indicate malicious intent. The document body and embedded URLs suggest a lure for game-related cheats or currency, ultimately leading to a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-robux-on-ipad-game-hack In PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/free-roblox-accounts-2021-v3rmillion_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/name-that-character-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/roblox-deathrun-hack-script-money_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/noclip-cheat-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/freerubux_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/codes-for-roblox-weight-lifting-simulator-3-hack_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/tiktok-free-google-home-mini_GM835599320.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/free-accounts-roblox-pastebin-7k_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/roblox-cheat-engine-hacks-2021_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/free-robux-codes-for-pc_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/how-to-hack-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/cheat-engine-table-roblox_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/roblox-build-your-dreams-hack_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/free-robux-hack-on-iphone_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_off00003286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3286 22880 bytes
SHA-256: 4b66d32003fdcdab6e971e1ae9677a8df8fe96b412872ee338090e196e64c8ab
font_01_sfnt_off000065ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AE 19068 bytes
SHA-256: 67e53c85bca0a69857880cc13847ac6002be1334b1a281a29b6a7cf4a4c37e3d

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