Malicious PDF — malware analysis report

Static analysis result for SHA-256 8959824407a66846…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 00:03:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fecfd48048568663a62e73252aae050f SHA-1: 11c850a47e132dd139517da90604d383c59d1e74 SHA-256: 8959824407a6684607d167dcc6dccb3a0e2fee50d943bd89a36eaca2b529c84a
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to websites offering game hacks and free currency, indicating a lure for users to click on malicious URLs. The document body and heuristics suggest a scam pattern, potentially leading to credential theft or the download of further malicious content. The presence of a password-protected archive lure implies an attempt to bypass security scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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
  • 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.tw/app/406889139/coin-master-free-spins-link-2021-today-game-hack PDF link annotation
    • https://library.stikesmi.ac.id/repository/pokemon-go-free-account-username-and-password_GM1094591345.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/tiktok-download-free-jio-phone_GM835599320.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-no-inspect-or-hack_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-pokemon-go-accounts-level-35_GM1094591345.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-t-shirt-black-free_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-back-accessories-roblox_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
stream_002_off00002ec5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EC5 22788 bytes
SHA-256: 1b80f1c136a7c328f867a93fb63f100fe221bbabe108794e28df6591a3b74b6f
font_01_sfnt_off00006184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 19100 bytes
SHA-256: de35a114d8e8c4fc4d70d52a756b20ceb128d757b6ef9e01fa5e276a673837de

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