Malicious PDF — malware analysis report

Static analysis result for SHA-256 856d7069a7282f56…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 20:04:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 17a0991392548ffdf504901db199ad61 SHA-1: d629477da7443d72ad41ddd29dc694e70ffdf026 SHA-256: 856d7069a7282f56bc22f3365fdd96539c1816d8a2be3b0d31864f4a7bd8d047
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on a domain associated with SEO link farming and game hack lures. The document body and heuristics indicate a strong attempt to trick users into visiting these sites, which likely host further malicious content or scams. No scripts were extracted, but the PDF structure itself is designed to facilitate redirection.

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.co/app/406889139/100-free-spins-coin-master-2021-game-hack PDF link annotation
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/free-jailbreak-money-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/how-to-hack-rich-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/www-roblox-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/login-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/robux-hack-no-downloading-games_GM431946152.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsnmodelpalopo.sch.id/__statics/gudangsoal/files/roblox-pokemon-go-free_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_off0000316e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316E 23076 bytes
SHA-256: f2b94669d5e9d979e5fc6a50eca24077521ccd85e047f942f548639cb5041252
font_01_sfnt_off00006593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6593 18576 bytes
SHA-256: 92d497f8bb7a4b7cecbf731ebca98dbb8eaec3bbe78b3fd35d47c848e72ff159

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