Malicious PDF — malware analysis report

Static analysis result for SHA-256 37681b417b9b3b55…

MALICIOUS

PDF

34.7 KB Created: 2021-06-25 12:34:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e003949504295095170d36af4f37cdc5 SHA-1: d6ce5be9a9d502a083c8b8e9a068f52b7524f037 SHA-256: 37681b417b9b3b559079bd3b12ccb7253dbbee019bfec711e44c6240b5073e90
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 4

  • 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/431946152/cool-free-roblox-shirts-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/cheat-online-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/group-in-roblox-that-gives-free-clothes_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-ninja-warrior-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/da-hood-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/pubg-uc-indonesia_GM1330123889.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/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-gamepass-in-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/box-land-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-generator-free-download_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_off00003154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3154 22164 bytes
SHA-256: df1332d7363d45a446f6b7be4afb1f807c3a46d098598fceaa00a8a734292e82
font_01_sfnt_off00006289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6289 19040 bytes
SHA-256: d10688aa6e0c569d40641e3040d0f64d136fa255831571a85cac9a6494496bd6

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