Malicious PDF — malware analysis report

Static analysis result for SHA-256 73cc90910aafd090…

MALICIOUS

PDF

46.4 KB Created: 2021-05-14 17:30:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9e75cb746b6026c914da5cc8dac5b2cc SHA-1: 14e0f0b2d598d89a1fbfb9765f34ff9e8d6aeb05 SHA-256: 73cc90910aafd090f9cddeab74dba2ceadb33e903d6d197d5dce3dfc5ab92278
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is malicious, specifically linking to a 'free generator / game hack' redirector. The document body and extracted URLs reinforce this lure, aiming to trick users into visiting potentially harmful websites. While no scripts were directly extracted, the PDF structure and embedded URIs suggest a common social engineering tactic to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 4

  • 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/431946152/how-do-i-get-free-robux-game-hack PDF link annotation
    • http://soma.com.ua/images/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • https://krnl.rocksIn 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_off00005007.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5007 29116 bytes
SHA-256: e2e685d949fb8f4330d95e680e0965995327bdaacb7322b6a79606b46adb2571
font_01_sfnt_off000092c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C3 18452 bytes
SHA-256: af4dc877dda7dbd9aa71ce66d9a52868b07d358fe63790b9b74aede2acb33558

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