Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9a510e23794e44…

MALICIOUS

PDF

33.0 KB Created: 2021-07-07 18:06:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fdc1b4ccf7c6fdda4549202690c80328 SHA-1: 74903b9403b96346c3b5e2d861a866482a18ec8e SHA-256: fb9a510e23794e44453a3dde1a73f086f83f84ce3894a85556d20463b5f6e67e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/mathep-game-hack. This redirector is associated with lures for game hacks and generators, suggesting a phishing or scam attempt. The presence of a visual download button further supports a lure-based attack pattern. No scripts were extracted, but the embedded URLs and redirector link are strong indicators of malicious intent.

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/431946152/mathep-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/if-roblox-got-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-download-games-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-hack-no-survey-or-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-bloxbux-in-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-admin-commands-on-roblox-no-injector_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/campingvip-server-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00002cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDE 22048 bytes
SHA-256: 876c1fa2d2d3d332d53750a457f1ca2303a696e320c757045d04286788bcb74d
font_01_sfnt_off00005d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D71 18544 bytes
SHA-256: 49092de834d3f8fc0161edca5c8ffc9035116622ffbf8cd5420aeadd749a8349

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