Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b78fd89f87d54d7…

MALICIOUS

PDF

33.4 KB Created: 2021-06-29 19:37:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a53ad6253f0442598a5fd2f63f412516 SHA-1: 6b6906070efc8592502d5520608653760f25e0f8 SHA-256: 1b78fd89f87d54d7e4f0b4abca41b92e89b8683e49d6168a941a47495c7e4fe3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'cheat engines' for popular games. The primary lure URL is http://netcdn.co/app/431946152/infinite-health-roblox-cheat-engine-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/infinite-health-roblox-cheat-engine-game-hack In PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/roblox-person_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/discord-for-roblox-swear-hack_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/roblox-hack-download-robux-pc_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-mexican-flag-roblox-tshirt_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/roblox-jailbreak-fire-hack_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/roblox-best-free-executor_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/tiktok-app-install-free-jio-phone_GM835599320.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/how-hack-in-prison-life-20-roblox_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://www.onusgroup.co.in/uploaded_files/userfiles/files/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_off00002c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C99 22384 bytes
SHA-256: c7e085d705592d570200813f67f933bff1f882857076269fca0852874923e7fe
font_01_sfnt_off00005e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E73 18876 bytes
SHA-256: f1bd185fcb8cd9566b49dd9e9b1ca55d3844e3cdf5d3023dac22691bc16b9349

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