Malicious PDF — malware analysis report

Static analysis result for SHA-256 5373ef9337e1a601…

MALICIOUS

PDF

42.7 KB Created: 2021-04-23 10:46:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b30e5bd431a9ce74ebcbabe8ea4a2c67 SHA-1: aa998c8a75a30842df19ee375bea846850f12ead SHA-256: 5373ef9337e1a6017a7a97a161f53a418abe260d760ebfdbb9dfe9aa2f16eb63
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a prominent link disguised as a 'free game hack' lure, directing users to a suspicious URL. This tactic is commonly used to trick users into downloading malware or visiting phishing sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netsecure.top/app/431946152/counter-blox-roblox-hax-free-game-hack PDF link annotation
    • https://maximabm.com/uploaded_files/userfiles/files/how-hack-in-prison-life-20-roblox.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/robloxland-free-robux.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/free-hack-robux-2021.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/how-to-get-free-robux-doing-nothing-no-hacks.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/how-to-bypass-cheat-engine-roblox.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/hack-any-roblox-account-script.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/free-robux-no-hack-robuxian.pdfIn PDF document text
    • https://www.maximabm.com/uploaded_files/userfiles/files/roblox-hack-robux-2021.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/roblox-hack-coden.pdfIn PDF document text
    • https://maximabm.com/uploaded_files/userfiles/files/how-to-cheat-in-roblox-mining-simulator.pdfIn PDF document text
    • https://freerobux.cyouIn 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_003_off0000420b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x420B 28844 bytes
SHA-256: 12a1e6c40a7ee448b13f7904532d637df7781e89ccd571c5f77f2e72e0e915b8
font_01_sfnt_off000084e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E5 18420 bytes
SHA-256: 702febc6d4c46d361d456c75e8f63dc95311ebea76214b2901a441ae327ef4f7

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