Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c5014bf441c066…

MALICIOUS

PDF

35.7 KB Created: 2021-05-25 08:08:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7f88bee4a92cd8796f6c87fa5cda2340 SHA-1: 59c2f340f7cf85217ca8416516a70e0377ee8ea4 SHA-256: a8c5014bf441c0662204db1806ff5a0cd4ed92f7d002148d068a59fef99c48e2
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 0.9492

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/479516143/minecraft-free-app-game-hack PDF link annotation
    • http://felmerihomes.com.au/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://felmerihomes.com.au/images/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://felmerihomes.com.au/images/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://felmerihomes.com.au/images/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://felmerihomes.com.au/images/how-do-you-get-roblox-for-free_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_002_off000034be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34BE 24156 bytes
SHA-256: 979505db832048a531a4ac3bcddb0769d9ffc05f3875234909ae4a1606fa1871
font_01_sfnt_off00006bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCB 17744 bytes
SHA-256: e23e7214a96fe4b3d719dc72cd7ebffceaaf9130bd2cd2fd107204a9a2f0c3c7

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