Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5747fccf6601a7…

MALICIOUS

PDF

45.1 KB Created: 2021-05-19 01:33:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e3e5d7c24961ad6716dadc9d6dad0a88 SHA-1: 6c0d8633719bbaeda07e7ade58928b6ae307f724 SHA-256: 9b5747fccf6601a719b3b0bbffb6294c69611c95544ffb25df66d7eed3877a9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector for a 'free generator / game hack' lure. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.xyz/app/431946152/how-to-get-free-robux-on-chromebook-game-hack In PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://pn-amlapura.go.id/new/public/ckfinder/userfiles/files/hack-coin-master-game-apk_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_003_off00004a1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1B 24764 bytes
SHA-256: 6297bd9b804ed2fb5f2a10a9d195ac89479b1fb369d5d569ba474c1c0f72f004
font_01_sfnt_off00008299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8299 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4B 18880 bytes
SHA-256: cfbdee24d7402b99052158ce8ccd316620959aaec27a5d82eaae160d81e49f1b

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