Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0533fbea6358ee8…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 11:04:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: deb9f35c71fb2333fad382ac99991023 SHA-1: edaa390fd4295600f77f2bd8b13c15f1a0add67a SHA-256: d0533fbea6358ee8128e43a8fcd979440d9959ac951fa586a73906fce3b436c9
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple lures related to game hacks and free rewards, directing users to external URLs. The heuristic 'PDF_SEO_LINK_FARM' indicates that the PDF contains a large number of external links, suggesting a malicious attempt to manipulate search engine results or redirect users to potentially harmful content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/microsoft-rewards-roblox-game-hack PDF link annotation
    • http://digilib.stie-yppi.ac.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/you-to-get-free-robux-no-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-online-no-installing_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-star-wars-first-order-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-stolen-places-download_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/el-mejor-video-de-hack-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-bee-swarm-simulator-script-gui-free-bees_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-no-anti-spam_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-can-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-cheat-new_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/trickempire-xyz-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hacks-and-cheats_GM431946152.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_off000032f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F8 22568 bytes
SHA-256: 8db6cf250b1e4c3dc47356242af003958267bec34d71238724fb91d64d1f0dec
font_01_sfnt_off0000656d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656D 19244 bytes
SHA-256: d5888bc21d96057e7009fdb8feb27fe5023594e25ad385ee997f7bd9f560ccf5

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