Malicious PDF — malware analysis report

Static analysis result for SHA-256 a594960dd2d90ea7…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 11:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7de4911f3e0a1634e9a6360d20707cd0 SHA-1: ac02b7f75cd30e6e87e09b5b7c176bf08b2066c6 SHA-256: a594960dd2d90ea7da8962168b91bd5274d6152e45c91b1ebd82eba3d62b27f8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/roblox-parkour-bag-hack-game-hack. This lure is designed to trick users into believing they are accessing a game hack, but it leads to a malicious site. The presence of a download button lure and ML classification further support its malicious nature.

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.co/app/431946152/roblox-parkour-bag-hack-game-hack In PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-hack-into-vip-rooms-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/rainbow-antlerts-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/pokemon-go-free-ditto_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/blox-rewards_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-villages_GM406889139.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_off000031d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D5 22044 bytes
SHA-256: 34fccc2bdb23edd0f6b1ba54845d409ef6f04f6a102a097b9035d70770e159c7
font_01_sfnt_off000062c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C4 18952 bytes
SHA-256: 86e0f374093dad17f9fcf687117d7886ca498c042c071f19915c59025202a15b