Malicious PDF — malware analysis report

Static analysis result for SHA-256 678e362d5d31a847…

MALICIOUS

PDF

42.0 KB Created: 2021-05-18 03:46:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b1a4e8229ff51c13274c0a47773885d6 SHA-1: 9fc3e7692b91f07314aedf6acb6a121bfa83e794 SHA-256: 678e362d5d31a847d4673c89abf167ab4bd8fb4e6e1c104e2777542f6346f797
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 0.9971

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 https://netcdn.xyz/app/406889139/how-do-you-earn-free-coins-for-coin-master-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004abe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABE 24284 bytes
SHA-256: d16c52244aa3fb7f9d11181b55c73f6eaa51592a117abb57716ec347954a1b22
font_01_sfnt_off000081a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A4 18344 bytes
SHA-256: 5806cda21877127dbf589a3d7d7b31f937fe3ba1f3a16df07ebea42887c1a658

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