Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc0550a2cb2be0a…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 16:05:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c1cec3b600b3a328ed1861cc6828cfc3 SHA-1: 76e03586535375061b88d8b17897e79886c202a8 SHA-256: ecc0550a2cb2be0acd1f108a8418c3bebb88227dd3b15ce12321b6d2818d5e56
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors and lures users with the promise of game hacks, such as 'Roblox Hack Clients Virus Free'. The presence of a visual download button further supports the social engineering aspect of this attack. While no scripts were explicitly extracted, the embedded URLs and heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful content or malware downloads.

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.co/app/431946152/roblox-hack-clients-virus-free-game-hack In PDF document text
    • https://nendientu.com/public/upload/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/robux-gratis-hack-sin-verificacion-humana_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/money-roblox-hack_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/roblox-monster-simulator-hack-script_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/robux-free-promo-codes_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_off0000304c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304C 21568 bytes
SHA-256: 69021229d31471556e7a613c85290bfbf33634c8b2dd067b38b28fe664c3496a
font_01_sfnt_off00005fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD2 19316 bytes
SHA-256: 63675658bf3701b40c6c5f99c1e53ab8d46413cf502166265249e07c2f99d55d