Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb185327b93bc28…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 17:15:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cee2c7499a84e0899989f91daccea750 SHA-1: 69cc9e8e8747bec6560cccac5cbf1dd26f25423a SHA-256: 4fb185327b93bc280c3131218cf9341417149d4939f987e3887b12d410592cf0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The document body, though heavily obfuscated, contains references to these lures. The primary attack pattern involves tricking users into clicking these links, likely leading to further malware downloads or phishing attempts.

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.online/app/431946152/heroes-online-roblox-game-hack In PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/is-coin-master-free_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_off000051b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B9 28004 bytes
SHA-256: 6537071873ad7fdf133c347a92a5fcaa1729cf9afcc648e6951ce75217ddcac3
font_01_sfnt_off00009030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9030 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1A 17904 bytes
SHA-256: d2079bf99977f163cee1c7bcc2927f6b86f82a10be6ceb2207c7e7d42ad6dc1b

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