Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff24585e87503e58…

MALICIOUS

PDF

54.7 KB Created: 2021-05-15 00:28:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 79c6d701932ca1c72a9c7ea7f3a82394 SHA-1: 87841322b9dd7ebc231822ee01532542283a5e95 SHA-256: ff24585e87503e58c739d8cce621a828a5508cfb1576a1a964f7a08f9ee6679e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising "Coin Master Hack" generators. The presence of a fake download button and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

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-hack-no-download-game-hack In PDF document text
    • http://modlingua.com/images/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://modlingua.com/images/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://modlingua.com/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://modlingua.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c08.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C08 25792 bytes
SHA-256: d5d0262d7879800dbd62248c20112f064dc15cce841c836508f007916598d631
font_01_sfnt_off000086df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DF 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00009486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9486 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_03_sfnt_off0000a906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA906 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_04_sfnt_off0000b2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F6 18296 bytes
SHA-256: b5e07150b2161f53c53a5a0ecf5e7f42140b65a1732b8c9e08245fa4e84c8ce4

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