Malicious PDF — malware analysis report

Static analysis result for SHA-256 31585a8efbdfda55…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 20:49:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b9fca7bfbe9d44b5fb62c0ede98e31c2 SHA-1: 4be8c93a0ecb5417fed30c58fa62bceff6d06e2a SHA-256: 31585a8efbdfda554ea899d9a8c244c515dc6bd10a7896201085d493c0fd86e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency. The document body and embedded URLs strongly suggest a lure for users to download potentially unwanted or malicious software. The presence of multiple redirector links indicates a deliberate attempt to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-app-for-free-spins-game-hack In PDF document text
    • http://opac.salatiga.go.id/slims7/repository/script-for-robux-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/youtube-nicsterv-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/pubg-uc-ykleme-hile_GM1330123889.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-gold-suit-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-redeem-virtual-codes-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robux-hack-apk_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/wie-kann-man-bei-roblox-spieler-hacken_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/jentplays-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/epic-game-free-liggiy-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/cheat-codes-for-roblox-royale-high-android_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-roblox-xyz_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/one-for-all-free-shop-t-schirts-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/linkmon-free-robux_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_off00002f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0D 23024 bytes
SHA-256: 2e30bd52521870757c7a507a44ebdebd1a9a33ae145458efacb03d26c1827f7b
font_01_sfnt_off000062a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 18176 bytes
SHA-256: bc884a3229ed83de6fe0f09d3de4cbfae9ae8b960387018b9df9e9e5860be4ee

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