Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ae416a30204e4c3…

MALICIOUS

PDF

45.6 KB Created: 2021-05-12 02:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4d9b0b192d3e17260a0cd17c9975317d SHA-1: d289d89b5ae380c79a705f92c23222bdbc814446 SHA-256: 8ae416a30204e4c3e3e16ade125723a61351bc212f062062c25e20dcc98c0918
162 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 fake-CAPTCHA lure and a password-protected-archive 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 0.9507

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-robux-microsoft-game-hack PDF link annotation
    • http://sdservicesrl.it/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://sdservicesrl.it/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://sdservicesrl.it/images/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://sdservicesrl.it/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://sdservicesrl.it/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/free-roblox_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sdservicesrl.it/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://sdservicesrl.it/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://sdservicesrl.it/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://sdservicesrl.it/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://sdservicesrl.it/images/free-robux-2021-no-human-verification_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_003_off000048d5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D5 26404 bytes
SHA-256: b46f50d6fb31233c3bc54ebd53447bc0228ff4e9a0fff452c2970b690e1931f8
font_01_sfnt_off000084e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E3 2936 bytes
SHA-256: e9fd9bc3017d29ba755ba61d5b0a0eea63bc3b4e88656cba1dbd21d065b39281
font_02_sfnt_off00008f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 18436 bytes
SHA-256: 753f3f2a839cbba740b1165c82973d17105d10f1d8ffbf22e8371d7b58d196dd

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