Malicious PDF — malware analysis report

Static analysis result for SHA-256 798b6170cc4c2022…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 23:51:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ff1c19a41d356eb0f46d9170bec0362e SHA-1: b47cf2da9b48a1541719758f3b49adfce43e8327 SHA-256: 798b6170cc4c202274c213595a490b898e195cfc861135ac4cecb63334b2afbd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a malicious redirector. The document body and heuristics indicate a lure for game hacks and generators, suggesting the intent is to drive users to potentially malicious websites. No scripts were extracted from this sample, but the embedded URLs and redirector findings are strong indicators of a phishing or malware distribution attempt.

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-bedrock-hacks-windows-10-game-hack In PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/cheats-for-money-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/how-to-make-a-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/100-real-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-got-tallent-piano-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/pokemon-go-kanto-tour-free-version_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-hack-gui-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-card-pin-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/change-stat-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-adopt-me-hack-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/robux-hack-generator-no-veriy-100_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-how-to-get-free-lvl-7-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-roblox-apocservers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-hacks-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-role-in-coin-master_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
font_00_sfnt_off00003369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3369 22016 bytes
SHA-256: 8a6115214e3949a5ecd65a78b680be744a0efc67afab63e0f9d19ac03e72b028
font_01_sfnt_off000063f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 19200 bytes
SHA-256: 92ba4d9be554fb736b9e7b1235b09796ba3046a264d1052683216498d49e4302

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