Malicious PDF — malware analysis report

Static analysis result for SHA-256 b354b5c5ca5680a5…

MALICIOUS

PDF

44.4 KB Created: 2021-05-17 21:47:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aacccb738136112f31700f9b930f5b10 SHA-1: 23489de214736ec6fc820f29e433b804f17882e1 SHA-256: b354b5c5ca5680a592f7719c64cad8bcf1071dd5406655b28673f60f49d65fcf
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 0.9980

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/406889139/coin-master-hack-app-2021-download-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-find-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/make-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/daily-spin_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-many-free-spin-links-is-there-for-coin-master_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_off00004b67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B67 29468 bytes
SHA-256: 7043fb6ab9a2ed5d9ec489065581d7305afdd8fc2c74fba78a6174e379004ec6
font_01_sfnt_off0000895a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895A 18876 bytes
SHA-256: be5be3eecf441f83945d2891df9f868a1d3a5dfc921b9d485f27c984001e53f9

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