Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a483260d51c1d52…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 05:54:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 12eea1e3362af1a3edc9bfa4d25fb1c4 SHA-1: a4e99aa90c45b15f36e8e7929873ab157726f628 SHA-256: 8a483260d51c1d52e628cbfa5783a6b70ceba0f261367ff27955147826a01040
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as "free generator" or "game hack" lures. The primary malicious URL identified is https://netcdn.tw/app/431946152/how-to-get-free-money-in-roblox-rocitizens-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attack aimed at tricking users into visiting compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/how-to-get-free-money-in-roblox-rocitizens-game-hack In PDF document text
    • http://heilzentrum-ulm.de/images/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-for-free-no-human-verification_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-instantly-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-cheat-money-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-admin-lua-script-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/roblox-free-face-accessories_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/pubg-uc-rate-in-india_GM1330123889.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/can-we-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/nuevo-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://heilzentrum-ulm.de/images/tiktok-for-free_GM835599320.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
stream_004_off0000508e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x508E 26748 bytes
SHA-256: 46d2a68a118e664bf70dd86aa494f0f5b8cc5a7527a65261e18ac98abec39a32
font_01_sfnt_off00008e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5D 18792 bytes
SHA-256: 0312c54a792db28b425b0d9028b0ef6502bacfe9bac2df55c600f79ea091f384

Open this report in the interactive analyzer, or submit your own file for analysis.