Malicious PDF — malware analysis report

Static analysis result for SHA-256 3363faf0ef8c8a07…

MALICIOUS

PDF

37.0 KB Created: 2021-05-10 13:21:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b0d7a686b54dba7e31d745370964601f SHA-1: 8b546ee95478f8476e17ef03298d0a95f989dfd8 SHA-256: 3363faf0ef8c8a07c40ee16760cd2f7f7ae2c7b1f1bbd4421b97807a218192f0
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 0.9649

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/406889139/coinmaster-free-spins-link-game-hack PDF link annotation
    • http://aessentia.com/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/rbl-gg-free-robux_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
stream_003_off0000374b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x374B 24308 bytes
SHA-256: 5e75be924a028d805f7d383f1f265c3eb4407b319b2f12ba7a55be4974d402bc
font_01_sfnt_off00006ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF0 18316 bytes
SHA-256: e23e47edf411310e4720a9a584017679d42dc8e6fe25c1f08798108aa15add5d

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