Malicious PDF — malware analysis report

Static analysis result for SHA-256 8363f48291b5b81e…

MALICIOUS

PDF

46.7 KB Created: 2021-06-09 14:57:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ea139d4d5028febd1e3fb8cd2aa01e9d SHA-1: d8531c63232d5b5a1d86e8236eda6578b5b98e43 SHA-256: 8363f48291b5b81e2574658ed02f8ca0dd5359a1ccf956e5c1cb1dcdcfa398d3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.tw/app/431946152/cute-free-outfits-on-roblox-game-hack PDF link annotation
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-kostiumy-w-roblox_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-generator-no-survey-online_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/earnrobux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/what-is-robux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/pokemon-go-free-quest-guide_GM1094591345.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/roblox-scam_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000512f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512F 24828 bytes
SHA-256: 31c2b52bdb43a776bccbec41fd1b62fdc893d823dfcf714a8eb7345f457cd299
font_01_sfnt_off000089d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D7 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000093c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C2 18312 bytes
SHA-256: 7381edae4f1f6548e0fe088dd5c39458cd59bda50ee4af950eaf7f73211224e6

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