Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa66e01aa37ba6c…

MALICIOUS

PDF

45.4 KB Created: 2021-05-11 00:09:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c8ba87242f2519c707c1ca2451fa64da SHA-1: 5cf1e37256956c335ef7f310ed8e276f8b0b0b3a SHA-256: 8fa66e01aa37ba6c755ad0a44ae18b6a1f03be2454a1947fe23652a718544321
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains and specific game-hack related URLs, indicating a lure for users seeking cheats or exploits. The heuristic firings confirm the presence of malicious redirectors and a game hack lure. While no scripts were explicitly extracted, the PDF structure itself facilitates these malicious links, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/406889139/coin-master-hack-software-game-hack In PDF document text
    • http://hilro.co.za/images/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/claim-roblox_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/spin-and-coin_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/hack-version-of-coin-master-apk-download_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_003_off00004b69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B69 25472 bytes
SHA-256: 04d02a96f9be7812cf723dc39e8dd57cf7ffcd38d824afa6fba96302737e41b7
font_01_sfnt_off00008524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8524 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00009027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9027 17880 bytes
SHA-256: 544f43ea8445c04f90b32bb89fa74997ce853b2370fee25cb972ddebb18b4158

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