Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d8da516a326030…

MALICIOUS

PDF

45.9 KB Created: 2021-05-11 18:05:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 62a6952df5793e8a0c2ae5492b48ed83 SHA-1: a9d9e6c77f3e97bb2a0ed26650ea09ed11131188 SHA-256: 35d8da516a3260301bb72dd21ba14925af2a76d0fdadf3fb98348b86acd35b35
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for game hacks and free spins, directing users to a URL that likely hosts a fake CAPTCHA or verification page. This is a common tactic to trick users into downloading malicious payloads or providing personal information. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-get-free-spins-on-coin-master-without-verification-game-hack PDF link annotation
    • http://manfeld.dk/images/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/freerubux_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://manfeld.dk/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://manfeld.dk/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://manfeld.dk/images/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://manfeld.dk/images/how-to-get-free-robux-on-chromebook_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_off00004c18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C18 25056 bytes
SHA-256: a60f2f240219479d8fed79e0cc3ce158518b9c65f29ed05a0ad5023c33b3b806
font_01_sfnt_off0000860f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC1 18688 bytes
SHA-256: 34013a01fc9b19de026014672642da8d02f9cc4163dada898040bd77c253fb22

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