Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0b1d1ca9edde62…

MALICIOUS

PDF

44.0 KB Created: 2021-05-14 15:52:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d22409b7b83d038147994940416a6b98 SHA-1: 189b03bb62a84b01d602c76d111bfc674d30e5cf SHA-256: 2f0b1d1ca9edde620006549ce89340897fc72268a161184fcfb4bbbe0faeb8c9
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 0.9648

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/406889139/how-to-get-free-spins-on-coin-master-ios-game-hack PDF link annotation
    • https://allhimalayantreks.com/userfiles/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spin-coin-master-2021_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_off00004960.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4960 24296 bytes
SHA-256: 3fad1d163b9422b6501330bc6deae3c591407c1038dff220ef319d17c46c691b
font_01_sfnt_off0000806f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A21 18052 bytes
SHA-256: 751b5bf5e2baa224d49100cdcfdcfacb8a421785831d1efd4091db32238aca98

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