Malicious PDF — malware analysis report

Static analysis result for SHA-256 061c80ba2e8b6a7b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 23:46:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6f96b4cc7ae4141aee2321f01fc256b5 SHA-1: 94971f7117419cd5a3c25e5cd1d0e45a9e7737f5 SHA-256: 061c80ba2e8b6a7b20314032a3236b96c648a53cde01bc39e2816ce3fcf4160d
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/431946152/how-to-get-free-robux-on-pc-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7//repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-no-inspect-or-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/spam-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-vip-in-roblox-fe2_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-know-if-ur-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-roblox-robux-android_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-paintball-cheat-codes_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-bc-for-free-october-2021-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-no-sign-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-roblox-thumbnails_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
font_00_sfnt_off00003022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3022 22924 bytes
SHA-256: 3398e49113d79ce1e11c68b6d62662c7ab1b0050f47282ecd1e080fc70181e52
font_01_sfnt_off0000636c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636C 19136 bytes
SHA-256: aef8c40112b84489b97b1b1a2bbf6c88e9b8fe4bc85a356f803a45374dab5087