Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bde3b03c5a780c…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 15:36:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c593ea3c0376c0e647137d2c9f261c59 SHA-1: 74c502a3f2f506abc0fce917661ac783c33311ca SHA-256: 74bde3b03c5a780c022d5e9a235d5b349ea140235fc37e883168b08d86a39de0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a lure related to game hacks and free currency, specifically mentioning 'Coin Master Free Cards Link 2021 Today'. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document likely attempts to trick users into revealing sensitive information such as private keys or passwords. The presence of numerous links to external PDF files hosted on 'dieter-sauter.com' suggests a multi-stage lure or download campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-cards-link-2021-today-game-hack PDF link annotation
    • http://dieter-sauter.com/images/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C8 24684 bytes
SHA-256: e04bbfb989d7a43e32a387f9b0b14553ca394abc153c5abafbb21c25491f4292
font_01_sfnt_off000082d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D2 18636 bytes
SHA-256: d718e2cb50f6f6a34b32f5d5c2dca0cb672e7940673eb9b7e66d247dab8a0a4b

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