Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8dfdfcd1c49a07…

MALICIOUS

PDF

42.1 KB Created: 2021-05-17 06:05:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 81c4e25f7d7f5bd623241eff06b5c997 SHA-1: c3e54bdb18a1e8033f0d711429b7be90454a802f SHA-256: 9b8dfdfcd1c49a07f149991a9f6faba1148e81559f92cc5021c9a016d8636667
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically a "no human verification" lure for game hacks. The ML classifier also flagged this PDF with high confidence. While no scripts were directly extracted, the PDF structure itself facilitates the redirection, likely leading to a further malicious download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/no-human-verification-game-hack In PDF document text
    • https://www.rondeberg.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.rondeberg.com/images/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • https://www.rondeberg.com/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.rondeberg.com/images/coin-master-hack-account_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
stream_003_off0000474a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x474A 26584 bytes
SHA-256: afee015539752e9a9be079e285368790d84a1a10c7981111afd35f7ee2efa708
font_01_sfnt_off000081e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E8 18328 bytes
SHA-256: 51e143abff7d47cba3402c6d776d710d5255c0d8709eb27426e755154b5a0611

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