Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84d2dc3bcd9bacc…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 07:49:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: db6c49b19662ada5ebfec6fc77bff034 SHA-1: 30bf6a9266cc77aefba902cfd98731b8c95636a0 SHA-256: b84d2dc3bcd9bacc8d69e0d930cfb8791435ceb8f7a66db321aad5df81dfe91f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector, that promise game hacks and free items. The document body, though partially corrupted, contains text related to 'Free Roblox Toys' and a URL that aligns with the heuristic findings. The presence of embedded links and the nature of the lures suggest an attempt to direct users to potentially malicious content or download sites.

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 https://netcdn.xyz/app/431946152/free-roblox-toys-game-hack In PDF document text
    • https://pa-waingapu.go.id/images/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/get-free-coin-master_GM406889139.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/roblox-g_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/minecraft-client_GM479516143.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://pa-waingapu.go.id/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A89 29044 bytes
SHA-256: 02f9371b0bcb4819c761a99c79ec0a8a6c946bf9cc8c445e5d9559b5cb2003c9
font_01_sfnt_off00008cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB0 18128 bytes
SHA-256: ced59fa1f5966ac3cb16d2fbea4d1e317d998f5f31502ffb274740285f9cbd45

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