Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97b74a6c0986906…

MALICIOUS

PDF

35.2 KB Created: 2021-06-27 16:16:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 79af34f15c813950b3a7295f527df80b SHA-1: c313e91034307a7b7cbf125344e6da9dbebc89d6 SHA-256: d97b74a6c0986906399b4563bc44194f16e05c2de1808d69185d46558e227dd8
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9980

Heuristics 6

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.co/app/431946152/free-robux-codes-2021-for-adopt-me-game-hack PDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-a-hacker-out-of-your-roblox-account_GM431946152.pdfPDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/jailbreak-app-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/egg-hunt-2021-the-great-yolktales-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-real-roblox_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-buy-obby-link-in-description_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-in-claim-gg_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/hack-cuenta-roblox-2021-pastebin_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/robux-giver-for-free_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/galactic-adidas-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-make-free-shirts-on-roblox-without-bc-2021_GM431946152.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_off00003266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3266 21740 bytes
SHA-256: fa79b3cf9eb1b4e70d0f222e330e227a67bea7e94a7ad1e7f7008259b11363f5
font_01_sfnt_off00006224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6224 19768 bytes
SHA-256: e13bf47212231b0812bacb0893789219bea7a16ae9478bee3ce14c1facb0e885

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