Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff276cdf2706b47…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 11:14:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 75e676abf0f645cfe6af720476f167a4 SHA-1: 3aac763a5f7920c1a4fd5feebb634e5c6a8fb281 SHA-256: 1ff276cdf2706b47605de7443d4c1dddddef11b37d88ebef57dcb899cfb4ca1e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 http://netcdn.tw/app/431946152/free-robux-generator-no-human-verification-game-hack PDF link annotation
    • https://mowana.buan.ac.bw/common_up/buan/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/roblox-epic-rap-battle-cheat_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/pubg-uc-online_GM1330123889.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/can-cheat-engine-execute-lua-c-on-roblox_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/hack-script-fame-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/poste-eybens-free-robux_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/free-roblox-redeem-cards-nov-2021_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/how-yo-hac-roblox-and-get-a-key-card-hack_GM431946152.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/pokemon-go-free-and-inter-egg-sting-development_GM1094591345.pdfIn PDF document text
    • https://mowana.buan.ac.bw/common_up/buan/files/coin-master-free-spins-hack-apk-download_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_off0000301a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301A 22028 bytes
SHA-256: f27a4435a5e4331d33b2f360ae8791eccdb17a9061a10491ef94f55772977bf4
font_01_sfnt_off0000607e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607E 19336 bytes
SHA-256: 1e7a5ee1c2d4ea33325644fd63b1f7e257f54daacec13fb4b037f0c912b7aa4c

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