Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6e6305f75e739d…

MALICIOUS

PDF

52.4 KB Created: 2021-06-10 21:14:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b13061103ca8d62b4500291fbf2805b4 SHA-1: 5520e8934c7467f9a3df3ee86bf7eac77bc699b5 SHA-256: ac6e6305f75e739d057d9ce675ba195220dd4c5608f582ae9f35b712a3e75280
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a fake CAPTCHA and lures related to game hacks to deceive users into clicking malicious links. The primary malicious link identified is https://netcdn.tw/app/431946152/roblox-to-get-robux-hack-game-hack, which is part of a redirector chain. While no scripts were extracted, the document's structure and embedded URLs suggest an attempt to lead the user to a compromised site, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9586

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 https://netcdn.tw/app/431946152/roblox-to-get-robux-hack-game-hack In PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-speed-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-online-free-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-roblox-accounts-2021-october_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-hack-elemental-battle-grounds-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000516b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516B 33996 bytes
SHA-256: 32ff6d5fa3c7a783efd7ad82e23ed5ec7f3f56e7da324fe8ff41b5388a75b8f2
font_01_sfnt_off00009cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF2 3916 bytes
SHA-256: 848a4fda411ca301b137e4e4f0df75b03cd3e2ed808d98f2a4afb57dc183a5a3
font_02_sfnt_off0000a9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9CB 18428 bytes
SHA-256: 43d31c33cb46972fc111a7ef9c42230658b58f85253ac199dc65b14e317c816c

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