Malicious PDF — malware analysis report

Static analysis result for SHA-256 f219873ec71f4c98…

MALICIOUS

PDF

53.6 KB Created: 2021-06-09 15:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 04cc9aa57c1f1236bef7e7d230030433 SHA-1: 1b6931159f43c06cdd8737403bf26f7c9847414e SHA-256: f219873ec71f4c9853f39922398b1027014cfc54510e009b21acc40c535c105d
142 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 and a fake-CAPTCHA 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 0.9636

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/hack-roblox-for-robux-2021-game-hack PDF link annotation
    • http://svadba-moda.kg/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://svadba-moda.kg/images/como-tener-hacks-en-roblox-prision-royale_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-free-followers-bot-2021_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-get-know-it-all-face-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/noclip-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/pastebin-roblox-accounts-hack_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-free-boy-face_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-20210-robux-download_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-giver-real_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-cheats_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/roblox-the-legendary-swords-rpg-hack-script_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/cheater-robux_GM431946152.pdfIn PDF document text
    • http://svadba-moda.kg/images/free-robux-games-that-actually-work-2021_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D6 28340 bytes
SHA-256: c583418b1c6062cddb322342852b331d0523366ecd4c6d22a1a79fe10a0ecdc9
font_01_sfnt_off000094f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94F9 7420 bytes
SHA-256: 0b188308ab0e7ffce9913d63d697a586f2937cafc51a771db38e3a566cd37e24
font_02_sfnt_off0000ad69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD69 18888 bytes
SHA-256: c407a9de618d4f5a6b224abe580eaf7abb9234cea21ebf4c1a2a7407273ce054

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