Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab796aebb06f9c56…

MALICIOUS

PDF

36.5 KB Created: 2021-05-25 11:39:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 20398fe2fb72d4c39a6a40cb4b37a7f0 SHA-1: 169253d75a1760c9ebc158f1dd4eb44f568c4c09 SHA-256: ab796aebb06f9c56391bcea543dd633a3f0bc2d3d45fbdfc4930cfff8cd44ed4
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a seed-phrase/secret-recovery lure. 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 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/coin-master-daily-free-spins-link-app-game-hack PDF link annotation
    • http://playmoorecello.com/images/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://playmoorecello.com/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://playmoorecello.com/images/wurst-client-112-2_GM479516143.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_off00003389.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3389 25324 bytes
SHA-256: 7786a8df40517a9250ba7ebadcabae9f480cb6b91e5d4efd1edd9817381e0d0a
font_01_sfnt_off00006cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAE 18476 bytes
SHA-256: 8af254e049fcccc1442405a550d0e3ce0b782d3872c3c9d4c1baf9e82e1cff79

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