Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae776278ad03b4f…

MALICIOUS

PDF

45.5 KB Created: 2021-05-11 16:03:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3273cb808abc81f73fd3c5202dfaffda SHA-1: 4421695c61c474af4ed81587980240e57ef57e9b SHA-256: 2ae776278ad03b4fb504f4d72fe46dda180aab274375f317d8b6e599c05d5c2a
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains associated with link farms and game hack lures. The presence of a fake CAPTCHA heuristic indicates an attempt to trick users into interacting with these links. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to malicious or deceptive content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-robux-app-real-game-hack PDF link annotation
    • https://allhimalayantreks.com/userfiles/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-survey_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-gun-mod-download-free_GM479516143.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_off00004973.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4973 25552 bytes
SHA-256: 1cdcf2d57a70e1273cc5f31ae7dd365ef2a83c0343bcfcaa6143879c1b352913
font_01_sfnt_off000084f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F4 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00008ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA4 18492 bytes
SHA-256: 9e447b6d8b47d61e54db9515b6598511f2c2f765926adb3e35dae1cd8ee44e1f

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