Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05bb24937942c4c…

MALICIOUS

PDF

41.0 KB Created: 2021-05-13 05:17:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e700354952536a8acb886b4ffaeccfc9 SHA-1: 3f8bdc10bd0def7c39d7e9e718a785afd5610b4c SHA-256: f05bb24937942c4c30ca9d95b584d80c6cfaaa299a281fb2d195ffd032b3b70b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to potentially malicious infrastructure, specifically advertising game hacks and generators. The ML classifier also flagged this PDF as malicious. The primary lure appears to be related to 'Coin Master' and 'Robux' related cheats, aiming to trick users into downloading or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-online-hack-download-game-hack In PDF document text
    • http://www.hlad.hr/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/robux-sign_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-spin-codes_GM406889139.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_003_off0000451d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x451D 24684 bytes
SHA-256: a4a42d33bbccfa3b18d6749a1e946a1dfba8f4e580874521c2587a78677777ad
font_01_sfnt_off00007db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB9 18296 bytes
SHA-256: a91dad97805a851d4d9dd61317d1e51430e69d3f7e26ebf67d6b1ffe25e57ed6

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