Malicious PDF — malware analysis report

Static analysis result for SHA-256 098e09802d3b51b2…

MALICIOUS

PDF

47.9 KB Created: 2021-05-10 22:33:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9c4efb2bc9a07fef6f765e0fd72db6d3 SHA-1: 11d66f8f55a3ef054df1ad5b7a0aaeb6fedcbd6e SHA-256: 098e09802d3b51b2245cba9abebe67fce1505c573b758fb5aa5deb96575017ca
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9977

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/best-way-to-get-free-robux-game-hack PDF link annotation
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/www-rbx-com_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/roblox-install-free_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.onliine.my.id/__statics/gudangsoal/files/coin-master-free-spins-cheat-codes_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_off00004d2a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D2A 33716 bytes
SHA-256: ea249ac022a6994b263159f741b80231039f496c0134e7348558bc244a6e88cb
font_01_sfnt_off00009800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9800 18724 bytes
SHA-256: 0e67c697191027b8b448214b8413bf6f3ed0ff1165507b95d6a34aabcad7a82f

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