Malicious PDF — malware analysis report

Static analysis result for SHA-256 e81b014d8e540cb0…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 19:57:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 54871197bc74c752278fadccba641770 SHA-1: adf5741655524f9a0d227b67217939bece90a549 SHA-256: e81b014d8e540cb0916eebac5c910d6050ad3f7dc798ada07c9af771a8512f02
82 Risk Score

Malware Insights

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

The PDF document contains a lure for a game hack generator, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and multiple heuristics identified the game hack lure and embedded URLs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/mcpe-master-coins-hack-game-hack PDF link annotation
    • http://www.rewaqousha.net/userfiles/files/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/pokemon-go-free-10km-egg_GM1094591345.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-discord_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_004_off0000501c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x501C 26044 bytes
SHA-256: 6f1528c0bd3f95293c4c54f50dd39c2c4885aa86c5c6b2737603cfebe5f70849
font_01_sfnt_off00008b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4C 17892 bytes
SHA-256: d01168f9bbbfe6455f8e766ddb511a9b706125e6492a8429ac9dad2f06419671

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