Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aac4dc1b81d16de…

MALICIOUS

PDF

39.6 KB Created: 2021-05-21 08:39:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d3369c52dfeb7263b521df4383cb898f SHA-1: 6c57e5956c6b0e7e125382d417978497fb45c362 SHA-256: 5aac4dc1b81d16de244bac643f7eb305c275e4f712e9f5cbff935ced8899e8c2
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 0.8060

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.xyz/app/835599320/how-to-get-tiktok-famous-free-game-hack PDF link annotation
    • http://cadcam.no/images/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://cadcam.no/images/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://cadcam.no/images/roblox-phantom-forces-hack_GM431946152.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_002_off000032ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32EF 26536 bytes
SHA-256: fd3ba771bff07b96bd4fcb1d7a3154005a09092a955ee8df479171e7fef1103e
font_01_sfnt_off00006f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 3000 bytes
SHA-256: e5e82144d204a242c5adf66680f51bf885fa7733b141b442bf45040b41e0a38a
font_02_sfnt_off00007999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7999 18248 bytes
SHA-256: 9d8c9ff8f23476e9e897d50e05ba1c89fe9a64794c9c08e4c2e4cb1c87253222

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