Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc15400bd214c07…

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 09:43:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 793a771e2a82b235249157fcb1630fb4 SHA-1: 85715f5e8545a1f1ccad71a779a404919d97aca5 SHA-256: dfc15400bd214c076c9702d91cdcd79bcc3da2673473d5716f406713b1904bd1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as generators for free game currency or hacks. The primary malicious URL identified is https://netcdn.online/app/431946152/codes-how-to-get-free-robux-game-hack. The document body and embedded links suggest a social engineering lure to drive traffic to potentially malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/codes-how-to-get-free-robux-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/wurst-115_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/collect-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-coin-master-spins-blogger_GM406889139.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_004_off00004f7e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7E 30160 bytes
SHA-256: f6eca1a158372e9de9a30b5cc7f40d90e3507577900b1905e5945f882558f9f5
font_01_sfnt_off00009367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9367 18456 bytes
SHA-256: e7ed60d24a78ba6057de20e743a58d73d760a91b60c41324c250f3bd6f119d62

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