Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f2860f73dafe30…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 11:39:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 56f97b331577a8a29cd48324e18f5c52 SHA-1: f4317d2defab47f4b121371f7d22d7191b0ce8fe SHA-256: e8f2860f73dafe30e86aef3cfe8f4935c1158b956914c712a6ead99d7d51a9b9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising free game-related content like 'Roblox accounts with Robux' and 'Coin Master free spins'. These links, such as https://netcdn.xyz/app/431946152/free-roblox-accounts-with-robux-2021-game-hack, are flagged as malicious and lead to known redirector infrastructure. The document body and embedded URLs strongly suggest a lure to a malicious website, likely for credential harvesting or further malware delivery.

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/free-roblox-accounts-with-robux-2021-game-hack In PDF document text
    • http://stroybelan.ru/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/100-robux_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://stroybelan.ru/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://stroybelan.ru/images/hack-coin-master-apk-32_GM406889139.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
font_00_sfnt_off0000492b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x492B 24716 bytes
SHA-256: 0ed3a127ac23807b4b57dcf88318e67d0eceb99f2241b24eb7b5585ce7b3f331
font_01_sfnt_off00008187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8187 19076 bytes
SHA-256: c054b0c192e62aa8d18573c4a3caef3c11adbf34d317da17e190ba3718f8ceb0

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