Malicious PDF — malware analysis report

Static analysis result for SHA-256 66648de1bb732e3a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 01:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a906728637b71ed737285b20d4892ffe SHA-1: d22f28a53f90b15352acaf732fb4e0408e844057 SHA-256: 66648de1bb732e3a45b0301122c8ce705f5f3f7f9dce7879b21455af22291082
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack generators, specifically targeting users interested in Coin Master. The document body, though partially corrupted, includes a URL that aligns with the malicious redirector findings. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content.

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/how-can-i-get-free-coinsn-coin-master-game-hack In PDF document text
    • https://www.prodex-holz.cz/images/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/getrobux-now_GM431946152.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://www.prodex-holz.cz/images/get-free-robux-no-verification_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C2F 25000 bytes
SHA-256: 0c075abf53bc19deb69bc9e8814dd1418b4cdea7e96a8cefbec56548a7a7d125
font_01_sfnt_off000084a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A0 17872 bytes
SHA-256: 7acb2ea7ca48292ff84e38b925b00f57c40a05e644be1ec1a4eb48c7cb3542c1

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