Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d0ffe911415735c…

MALICIOUS

PDF

42.8 KB Created: 2021-05-11 05:56:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e953cdedd213eba15dfa184d59e13ec7 SHA-1: 12d4376553898ce858a8644af7c67c1d22ecfa30 SHA-256: 4d0ffe911415735cdc1b39b99f25859013c814368bdc2d1362c78eea2906ca8e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-spins-hack-2021-game-hack PDF link annotation
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/get-free-robux-today_GM431946152.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_off00004bf7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF7 24732 bytes
SHA-256: 02dd51ec75102836ae37bce27ac9a60c9c6f9ea2bf4d9b6b9d478e8c9689fac7
font_01_sfnt_off000084c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C7 18296 bytes
SHA-256: eaa60ab3b9dbdc46d7aef4d77b4227c1d0aeb4180c3635ae77be6ae4ebf58c24

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