Malicious PDF — malware analysis report

Static analysis result for SHA-256 714c55b186ca0c5c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 07:27:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 971980cfeffa75719100f5c771f34db0 SHA-1: ae4e9c627396736b4773e63733ccf2ac5f220d08 SHA-256: 714c55b186ca0c5c9bfb8497fa4d350eb707d380b8edfe5e8a45463c3142cada
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/406889139/coin-master-hack-spins-and-coins-unlimited-free-game-hack PDF link annotation
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-in-roblox-without-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-robux-no-verification-ios_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-paying-for-it_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/roblox-full-throttle-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man2brebes.sch.id/__statics/gudangsoal/files/free-coin-spin-daily-link-coin-master_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_002_off00003348.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3348 22544 bytes
SHA-256: 8304a207eea05a77036f9b40ec42dc93bca890840e9d9d3eb74ba2adecb99e4e
font_01_sfnt_off000065d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D8 19036 bytes
SHA-256: 210ffa2b1257eecc61bc0a96a8b024f9d7cb0b9b85e8dcb329e8b8773fbc43e7

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