Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b326c74cda9b18…

MALICIOUS

PDF

42.0 KB Created: 2021-05-16 05:04:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: bdd772ecf90ea60af3ce5e3b6eb226f5 SHA-1: 7783e1f7e5ef979968647011a98d23a2cbd7cbdf SHA-256: 19b326c74cda9b180b3583c1e5da2d30c9e31137585261ff138685e9a264e30f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as 'game hacks' or 'generators'. The document body and embedded URLs strongly suggest a lure for users seeking cheats or in-game currency. The presence of embedded URLs and the nature of the lures indicate a phishing or scam attempt, likely leading to further malicious content or downloads.

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/479516143/how-to-make-your-own-minecraft-pe-server-for-free-game-hack In PDF document text
    • http://www.gravel.ru/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://www.gravel.ru/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gravel.ru/images/can-i-get-free-robux_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
font_00_sfnt_off00004a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A56 24496 bytes
SHA-256: a702589634307481ecfc020680aaeee4f3c15105b31cfd510c869b2c808b6a94
font_01_sfnt_off0000810a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x810A 18616 bytes
SHA-256: 7f1ed811d94b63e364c058ff1b231f2e8228461263d94dfafa7c0dfe2cf4e047