Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a6b581454a19fc…

MALICIOUS

PDF

46.1 KB Created: 2021-05-12 03:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 845c3ab9c17a32b37bb9d946b4f898ef SHA-1: fbc3499e552534875059495e29c6f69f4a9f7bf2 SHA-256: 49a6b581454a19fc27f6fa5be61db5ce24db3f4f4a3772eecab45f5ae1a467fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users to websites offering 'free generators' and 'hacks' for popular games, which is a common social engineering tactic. The heuristic firings indicate these links point to malicious redirector infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a malicious workflow intended to trick users into visiting potentially harmful 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/406889139/free-coins-and-spins-coin-master-2021-game-hack In PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-robux-with-no-verification_GM431946152.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_off00004c23.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C23 32552 bytes
SHA-256: c2aa0029124617c8e7e366a9e43ecf4659193bf01cdf515de876235bcf98ac82
font_01_sfnt_off00009158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9158 18460 bytes
SHA-256: 871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a

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