Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f086e3394e491f…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 20:04:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4439c77fb8c17fc70cadbe7063f6ed04 SHA-1: 3c3ffe67a133dc41c528fc56beb4b12fb5118f70 SHA-256: e1f086e3394e491f859d89b77aaab442e2c30bbec5850cd57fdfbcd9bcb059bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, specifically promoting 'game hacks' and 'generators'. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the embedded URLs and the nature of the lures strongly suggest this document is designed to lead users to malicious websites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/479516143/minecraft-hacked-client-game-hack In PDF document text
    • http://www.rewaqousha.net/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/pubg-uc-logo-png_GM1330123889.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://discord.ggIn 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_004_off000053b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B2 25268 bytes
SHA-256: 91004ba1a63935456c07ff6800aeadc73479a14bf94f32a8b0d7abb34a14137c
font_01_sfnt_off00008c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3F 17988 bytes
SHA-256: 60084e38a3b13cc374d8b54708ec2a3852040562095209170bda5240b53bf335

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