Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ec6722e2f2a28e…

MALICIOUS

PDF

53.5 KB Created: 2021-05-14 22:33:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 61acd6afa8f0599039a6eb981116d414 SHA-1: e1e7ecc3aa0ff5fca68569ae7a2ee6f2172f0afa SHA-256: f2ec6722e2f2a28e40fe7f892ed21fd96bc816d708a193524adf89368381694c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9017

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/431946152/picture-roblox-game-hack PDF link annotation
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-mod-apk-35-8_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/cone-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://Buy.HoaxMC.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C05 24960 bytes
SHA-256: fc0f5c4d606c2c5e8ac63849e2daf68ca8ebc26b7ac76b42f504ca9e013fb492
font_01_sfnt_off0000855f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855F 8704 bytes
SHA-256: ddfd86c88a6b8304bc31eeb9f28c8110fac325cdacc87503bacf4ac741777490
font_02_sfnt_off0000a1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1C5 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000aed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAED7 18304 bytes
SHA-256: fb2c3c980a38bca32d46854b97c41d724600372d3bdcb5f331df89f1565b3689

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