Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b152e6f70ae960a…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 22:37:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1453ddc64c496c08223b4d9c0df14d1d SHA-1: 822ed44c7a0439c73543f9af20dcf0c85a4dcd03 SHA-256: 1b152e6f70ae960a0f3f35fe585beb6b2f4d64baea5b6c0a0589ca6c5588eb70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating a malicious redirector lure, specifically targeting users with promises of game hacks. The embedded URL and document body text directly point to a 'Coin Master Hack' which redirects to a known malicious domain. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack to drive traffic to malicious infrastructure.

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/coin-master-hack-no-verification-no-signup-game-hack In PDF document text
    • https://adventureglaciertreks.com/userfiles/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-rixty-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/accounts-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/hacks-para-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/minecraft-esp_GM479516143.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/robux-hacks-pc_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/roblox-printables-free_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/free-roblox-app_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/cheat-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • https://adventureglaciertreks.com/userfiles/files/roblox-download_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_002_off000030a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A1 23140 bytes
SHA-256: 6446ec15d2cefd5ee4bf01a25cb3fc2f8acb221cd331f717c23be7a1da45da3b
font_01_sfnt_off000064d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D1 18456 bytes
SHA-256: 746a31f4225d239cd95c21053bb433ae876026660db10b4a8cdd862077744942

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