Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eab7f930114fda3…

MALICIOUS

PDF

36.5 KB Created: 2021-07-04 00:42:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4cde2d0cc93e766061e2c684bd8ccb20 SHA-1: fe4ffce87cb4128ac8bddf783de500e115902964 SHA-256: 0eab7f930114fda3d6bb51e83766e2af1deba8e4ca212f6e01ea3e8c986d63fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to malicious infrastructure. The primary URL identified is http://netcdn.tw/app/406889139/legit-coin-master-hack-site-zyngaplayerforumscom-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.tw/app/406889139/legit-coin-master-hack-site-zyngaplayerforumscom-game-hack In PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-roblox-accounts-with-robux-september-2021_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/veil-roblox-exploit-free-download_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/body-roblox_GM431946152.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://allhimalayantreks.com/userfiles/files/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-In 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_002_off00003481.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3481 23628 bytes
SHA-256: 06d1b9083fe4e5a8a52cb1871c61d00ecf1820f1bd1ddeba953e0b381e66cb1e
font_01_sfnt_off00006a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A37 18928 bytes
SHA-256: 2d8f15398b0872070122c1c8280df31c6af84f2aed26de9ea3bfb6d3ad73ce84

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