Malicious PDF — malware analysis report

Static analysis result for SHA-256 031003bebb5a0855…

MALICIOUS

PDF

46.9 KB Created: 2021-05-13 18:42:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eb971384618ea1b072be836b2a973167 SHA-1: b148062cea966e4de31a7e74c530ee0bac482c06 SHA-256: 031003bebb5a085569d719a0c8d93d263cc6efc5c334bfbcb2644830450d82bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them, disguised as "game hacks" or "free generators". These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment. No scripts were extracted, but the document's structure and embedded links are indicative of a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/is-roblox-free-on-pc-game-hack In PDF document text
    • http://jjpremiers.com/files/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-website_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/apk-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004991.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4991 29184 bytes
SHA-256: a744e4e75689738ed6826a991c43b7362b8357ec9a56c75cd99d07f498cc2ca2
font_01_sfnt_off00008b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B72 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9582 18104 bytes
SHA-256: 887ee8609669ab7cb05f111c4632febe2636a6d42dfdad4eb8460b2092c303a0

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