Malicious PDF — malware analysis report

Static analysis result for SHA-256 0315eb1b80e6a20c…

MALICIOUS

PDF

48.7 KB Created: 2021-06-07 08:24:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e09a2792cf6e7bb1a96dd8b27313c14f SHA-1: 0fbf80e9c3f189f5ba855c1602c0e8f217385958 SHA-256: 0315eb1b80e6a20c23f8c79784c8e63da177459ea4ef53926cb208b669926ad0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'generators'. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake generator for in-game currency or cheats, designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 https://netcdn.tw/app/431946152/roblox-infinite-jump-hack-with-pictures-game-hack In PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/generator-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/pubg-uc-official-app_GM1330123889.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005380.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5380 25292 bytes
SHA-256: 482847aa1944111891a57a2a36a282368011f34496787569515bb7f839be759b
font_01_sfnt_off00008e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4A 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000097eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97EB 19664 bytes
SHA-256: 42bdac271d8cfdce48f5087c674e846c85d7a8933f4421e6d622da394df3ad46

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