Malicious PDF — malware analysis report

Static analysis result for SHA-256 4445330ac19202fe…

MALICIOUS

PDF

51.2 KB Created: 2021-06-08 23:17:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 8a329c9877e995e4f506dd4f9f9e03b6 SHA-1: 0f7e0452a34e3f8cf984cc64c8e22eadef9058a4 SHA-256: 4445330ac19202fe22980fde83192250dca2420db85af9418da5a89d2cdc12a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as generators for popular games. The document body and heuristics indicate a lure for free game currency or hacks, designed to entice users to click through to potentially malicious sites. The primary malicious URL identified is https://netcdn.tw/app/431946152/free-diamond-generator-roblox-royale-high-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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/free-diamond-generator-roblox-royale-high-game-hack In PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-download_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-person_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://agama.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.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_off0000524d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524D 30324 bytes
SHA-256: 493fea5b66f7afee8dcb3434d8e5a640ba251a1a642e7a3c93290d0cd7d7501a
font_01_sfnt_off000096a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A0 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off0000a1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1CA 19636 bytes
SHA-256: 7b3f9423d8c199d74bce1c8ef498dc622828fada850e81ecad15b91ef23b7f92

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