Malicious PDF — malware analysis report

Static analysis result for SHA-256 351e98fbdeb0c3d4…

MALICIOUS

PDF

48.4 KB Created: 2021-05-16 13:09:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cd653e3792762f076dfd04aeff823155 SHA-1: 586b89e5e8156862e6aeb6d919ea0f603a50d276 SHA-256: 351e98fbdeb0c3d430c8ba3e96c68a210fe453f3c31a84da5a4ceb69e2461a88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks. The primary malicious URL identified is https://netcdn.xyz/app/406889139/http-bit-ly-coin-master-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow, likely intended to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/http-bit-ly-coin-master-hack-game-hack In PDF document text
    • http://www.flotom.at/images/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/robux-scam_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.flotom.at/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://www.flotom.at/images/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.flotom.at/images/free-robux-website_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000052e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E4 25740 bytes
SHA-256: a19093a49243ae042144d5bc8cf946d1f64e089554a78dd31fec330500c00930
font_01_sfnt_off00008d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D45 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000972f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972F 19436 bytes
SHA-256: 1a4b30a9b4805a68c5b48992175f429c3900e9a25eec40c38e24ead8bf8dd286

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