Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a80743b6bda2729…

MALICIOUS

PDF

50.2 KB Created: 2021-06-09 01:40:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 07bb44421a51c2b72975dc258fa906b9 SHA-1: 7867784fbbf6714f263231964fd77ed922000880 SHA-256: 2a80743b6bda2729690986396ca10bac307277d5a1ae458af72ca274cfa15428
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that point to known malicious redirectors and lures for "free generator" or "game hack" content. These links are designed to trick users into visiting potentially harmful websites. The document body, though partially corrupted, also contains similar URLs, reinforcing the malicious intent. No scripts were extracted, but the presence of malicious links and the ML classifier output strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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.tw/app/431946152/how-to-get-free-robux-just-by-2-steps-game-hack In PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-2021-roblox-codes_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-giver-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/watch-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-roblox-card-code-generator_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-tix-on-roblox_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-hack-peoples-account-roblox_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-works-no-surveys-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-no-generator-no-download_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/minecraft-online-free-download_GM479516143.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
font_00_sfnt_off00004ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EBC 26336 bytes
SHA-256: 48f621f6976984ce55b1cb09b29ccd660a7cf3931fa915182230011efa28ac44
font_01_sfnt_off0000898e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x898E 5764 bytes
SHA-256: 2269e0ba857bbe9556f89aa5804cc693312949a52a6e776680609ed237d122f4
font_02_sfnt_off00009cb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB7 19808 bytes
SHA-256: 69d11337d562d0751bf1e827cd167b9df2cde11d8e62832d9c5f8b4bde5e387f

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