Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ce4fe716fcc573…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 18:10:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1c89b503f3f173021518753fdc2e7672 SHA-1: d9d8b58da884bcf90c35cf33c4dcdccfdcf1d5d4 SHA-256: 66ce4fe716fcc573fc96953c733ac44b1dbf5d82525ed470764758ed2cb7f727
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or game hacks. The heuristic firings indicate that the PDF links to a known malicious redirector and is flagged by an ML classifier. Although no scripts were extracted, the embedded URLs and the nature of the lures suggest a phishing or scam attempt designed to lead users 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/431946152/bux-life-free-robux-game-hack In PDF document text
    • https://sunnygarden.com.tw/image/data/files/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-cheat-engine-for-mac_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-dinosaur-simulator-cheat-engine-dna_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/counter-blox-roblox-offensive-wall-hack_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/cache-http-thebuxiancom-howtohackanyonesrobuxandstealit_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-no-fake-no-verification_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/gaming-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/daily-coin-master-free-spin-link_GM406889139.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_off00002f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F92 22824 bytes
SHA-256: 2952f1614dac4100f4459413e4e26c52d91285759f78cb32936342b531b2d565
font_01_sfnt_off000062cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CC 18836 bytes
SHA-256: 7f12d751da4e96ccad4d997d7560df235183c1e20666712b69b1e712c003bbe9

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