Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca820c1da9112bfc…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 05:07:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0b0d714d1c18de9c3855a9ddb957cdd4 SHA-1: 3c5874efb56fca048e8fda047ce278ed816b2d34 SHA-256: ca820c1da9112bfc145f2b21ba8fc4cd70c888788d50e817f4f890d88c117bc8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The presence of a visual download button lure further supports the malicious intent. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/479516143/minecraft-wurst-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-clothes-in-the-catalog-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-roblox-condo-map_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/install-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-cheat-engine-bypass-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robloxcom-robluks-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-assassin-hack-exploit_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-free-apk_GM479516143.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
font_00_sfnt_off0000346a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x346A 22524 bytes
SHA-256: 1a4d139a488fad44d2871c07849b5f62a78d153bd7b1f8f32e1f74607b50d617
font_01_sfnt_off0000659b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659B 18196 bytes
SHA-256: a23478f9f56669a76cf56b8835be903c3d1a782a7d8b6a30124e2d5a3e2311d7

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