Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5754cfe2b9b1e6…

MALICIOUS

PDF

36.6 KB Created: 2021-07-03 18:21:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 19789b6859eace115dee9f60fa0ae518 SHA-1: d12dd3c22220d45836570640bc2264cc1b264402 SHA-256: 8e5754cfe2b9b1e604d36841792f3051e5fc57cac336e48774950911382b5090
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 5

  • 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.
  • 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-spin-group-game-hack PDF link annotation
    • http://sttlets.education/senayan/repository/fairy-world-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-hack-roblox-money-mac_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/pubg-20210-uc-price_GM1330123889.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-enter-paid-games-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/runthisrobloxcheat_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000037fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37FA 23292 bytes
SHA-256: 257efdfb0e55cd6363f0df7ce65cc061d56b676454eb26729b9a12a4285f63f4
font_01_sfnt_off00006c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C60 18312 bytes
SHA-256: 450042c4f8d408e8d8484b2d9e1e439f1c658d0a6330ca9cb9236370181326bd

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