Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f07359f65816f5…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 04:38:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f39ca331a91f795d1dd5bf9b4621b566 SHA-1: b4143bf229beb88b54b7a9bd8a6dd5f5f484c94d SHA-256: 90f07359f65816f5f0dc044dd1ad3fb0c1d339dbda8fa272425ca0a47e60282d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to 'netcdn.tw', that are designed to lure users into downloading game hacks or generators. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs and a 'game hack' lure heuristic points to a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/479516143/how-to-get-minecraft-realms-for-free-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/free-synapse-roblox-exploit-13-05-18_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/exploit-roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/123link-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-roblox-jailbreak-beginner_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/cool-idems-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coins-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-someone-on-roblox-2021_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_off00003109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3109 22196 bytes
SHA-256: c4ed77322aa9274742dac3f2f16f2c294232c8d02c82575bc42cb781353deeaf
font_01_sfnt_off0000623c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 18496 bytes
SHA-256: 206556e0041cad10c7ca9339ae93eddcae4d18c9e91f782ddd10985e6c899e97

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