Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a541ff9f85d8a65…

MALICIOUS

PDF

43.3 KB Created: 2021-05-14 15:34:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 74d2d27f0de86e47da58f88717f9b749 SHA-1: 3ee35431e96fe9c9b5bd11e9ee281f6f71743c22 SHA-256: 1a541ff9f85d8a6552caa4cf311f799ba0497f4a5d86279e73c2a8c7d6242b00
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to a URL related to Coin Master game cheats. The document body and embedded URLs reinforce this lure, suggesting the primary goal is to redirect users to potentially malicious sites for game-related exploits. No scripts were extracted from this sample, limiting the analysis of further execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-spins-on-coin-master-links-2021-game-hack PDF link annotation
    • http://www.zdravazena.sk/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://www.zdravazena.sk/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/rbx-sites_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-earn-robux-for-free-2021_GM431946152.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_003_off00004b4d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4D 25976 bytes
SHA-256: b6b5d161656f550583feaa445f28f15966864bb329e6431f94714161c41ebbeb
font_01_sfnt_off0000862b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862B 18456 bytes
SHA-256: 7b1155f871a560b207ad2828617dae8a6faf2a903bcd289e8190a508e5d9fe16

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