Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d5a5c021de32fc…

MALICIOUS

PDF

36.9 KB Created: 2021-05-21 01:09:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4cc91bb3e4d1a7a671b66313973f9126 SHA-1: aaa1de0baaba2aa6cfb965f9686f999bdfb22a28 SHA-256: 01d5a5c021de32fc40d9cd41b67faa29e912bf25bf784f199f7531f333deaf23
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 0.9447

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/431946152/free-roblox-animations-game-hack PDF link annotation
    • http://umksn.pl/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://umksn.pl/images/haktuts-coin-master-free-spin-link_GM406889139.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_off000036c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36C0 24088 bytes
SHA-256: d1b526e1e7dcae3729f688f857f8f2f5a2659f8df068f8d3e7da9354d757718d
font_01_sfnt_off00006dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 18660 bytes
SHA-256: b7eb9f6264085e4628e5be6666b33d277e79f075b825501a8967555352acd939

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