Malicious PDF — malware analysis report

Static analysis result for SHA-256 7372c50259736d06…

MALICIOUS

PDF

44.5 KB Created: 2021-05-11 02:37:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3101bb8723871ea73f818096dd2482f2 SHA-1: e7719ae1532548e109ae05b83064872417eb2c61 SHA-256: 7372c50259736d06fa9af2c918d425e121573d9d146d96d1bce7ca58d17b6b38
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 0.9632

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-free-link-daily-game-hack PDF link annotation
    • http://subarulegacy.com/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/hack-a-game_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://subarulegacy.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://subarulegacy.com/images/coin-master-hack-tool-access-online-generator_GM406889139.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_off0000489f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489F 25128 bytes
SHA-256: 14e98a6673aed695c8bf17ed2e26d6fd86dfe7b76600e987187d40ab240dd807
font_01_sfnt_off00008079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8079 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00008b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B58 18304 bytes
SHA-256: d4d3f57bf8cf1b361744efde21cb2de148eed87c90371e8e56e2c4a81fe787c2

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