Malicious PDF — malware analysis report

Static analysis result for SHA-256 0657d1e1a8d64086…

MALICIOUS

PDF

44.6 KB Created: 2021-05-19 12:16:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5599edb4461e7135bb921ed3deaeb5c1 SHA-1: a93db6c80e4e7c18afe9af5456290a4d4ab6281f SHA-256: 0657d1e1a8d640868c992a9384685c8d4c9f2cc8b5a1d27b614473b6297e07ec
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 0.9632

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/daily-free-spins-coin-master-app-game-hack PDF link annotation
    • http://bijbelreizenisrael.nl/images/oprewards-com-login_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/roblox-rules_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/roblox-hack-me_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_003_off0000458c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x458C 26132 bytes
SHA-256: 08ce8fcb5e274f8620f3c2829c0f3a18ca354e3e677849aa5ccbb70d40b00b87
font_01_sfnt_off000081da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DA 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8B 18308 bytes
SHA-256: 72dba927d197b121f2f79f603316478a8fd74b1897291e20c9d2ace2afc386f7

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