Malicious PDF — malware analysis report

Static analysis result for SHA-256 158025201f164c65…

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 19:12:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 055e9fffb7ac39e0a6430f6ce81ded76 SHA-1: e25092f784d33fe7dc7c8d6e73129f2bf780ea39 SHA-256: 158025201f164c65015dfc8663282782aa80df2315698c9617531d216fddfa0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically targeting users with lures related to game hacks and free currency. The primary redirector URL is https://netcdn.xyz/app/431946152/https-rbx-place-rewards-game-hack, which likely leads to a phishing or scam page. The document body, though heavily obfuscated, contains references to these lures and additional URLs hosted on 'aleshashop.net'. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/https-rbx-place-rewards-game-hack In PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/how-to-get-robux-easy_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_off00004b27.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B27 26840 bytes
SHA-256: b5fdce1dc133b0f69f15d9cf6f1ef648e24f4a83fb39a5aeb6a4504ba843c926
font_01_sfnt_off000088c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C8 18640 bytes
SHA-256: adbb92b042532d7f987745dbbe30e528a9aa5ccea6c943b93cd0d8aa572e92fd

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