Malicious PDF — malware analysis report

Static analysis result for SHA-256 608231c8a7c65cdb…

MALICIOUS

PDF

37.7 KB Created: 2021-07-05 14:58:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 9afdcb0dbbec3549e255d0c2d9b91e72 SHA-1: c04ac945d0d72264ed9678c3febf40100efc124b SHA-256: 608231c8a7c65cdb56323b9500bef3c373faf038eccf8d651297977d74539c54
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/https-iosgodscom-topic-20218flipmastercoinshack-game-hack PDF link annotation
    • http://sttlets.education/senayan/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-hack-robux-with-robux-generator_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/hack-ticks-and-robux-no-scamn-idiiotr-rwetfr3eytegr-tgre-ee354_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/install-roblox-player-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-roblox-hacker-co_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/hex-number-gives-free-robux-robuxian_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/paste-bin-dab-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/pastebin-headless-horseman-free-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/como-hackear-a-jugadores-de-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-cheat-website_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/no-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-longest-super-fun-obby-cheats_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-hack-redwood-prison-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/webs-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/tiktok-free-99_GM835599320.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-coins-link_GM406889139.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_off000036d0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36D0 23872 bytes
SHA-256: fe7252645a1af1de784598685c59fd0edbce2f2e738e489abef239d59fa317e7
font_01_sfnt_off00006d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D09 19628 bytes
SHA-256: ddef5dcbd34287e7c11d57da792f40b0674e615bb4601f5eb3c68c5e32a24415

Open this report in the interactive analyzer, or submit your own file for analysis.