Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c52b3fd52cbca8e…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 12:48:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 72bed74a352e41d90fd6c5a2a1c73b16 SHA-1: 09d4986e1539a598a817c3e3c9c3bae60ff76d15 SHA-256: 6c52b3fd52cbca8e5e5c96a8e352b4162f340305099aa10b4350a217df59301f
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 0.9865

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.online/app/406889139/can-you-hack-coin-master-game-hack PDF link annotation
    • https://opac.heritagejkt.org/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/pubg-uc-hack-app_GM1330123889.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/pokemon-go-mod-apk-joystick-free-download_GM1094591345.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/mc-hacks_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-unlimited-spins-apk-free-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
stream_004_off0000511b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511B 26032 bytes
SHA-256: cae62c69c3ddb330cd2817337ee847d2d3b442970b41205f836bcba298f4bb67
font_01_sfnt_off00008cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB1 18020 bytes
SHA-256: 2a833d42ea66e9b84acb7b91147defd58d864c1bb9bc3ae4b7d787d82e58cd2a

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