Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a988b669b4810a…

MALICIOUS

PDF

42.1 KB Created: 2021-05-11 07:06:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d43c7ab87fa3022d8f2677d32528c9e5 SHA-1: 8b129db2ea1d5a5fdb779e1d025b35dbe99ef662 SHA-256: b9a988b669b4810a427a8c5ce773f713a47136c50d039d9e807bd3edb155e483
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary lure URL is https://netcdn.xyz/app/431946152/bux-gg-robux-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/bux-gg-robux-free-game-hack In PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/real-roblox_GM431946152.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://xn-----clcdhzcbmgnochhb1boe1a6b.xn--p1ai/images/coin-master-free-generator_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
stream_003_off0000487b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487B 25324 bytes
SHA-256: 1a46628eccd4a828b5a2555e2bc116f07e440ea59f13b24fa222d69a6cd8511a
font_01_sfnt_off000081e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E9 18304 bytes
SHA-256: 8d8733a7c40ec122fa0656e79a44d71687d26648648a8c1fb15c9a660e1bc95a

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