Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e560f959aa3d11…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 10:30:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 21653e40b5006609937987001d87dec1 SHA-1: 7d7b8cd8411b186190f0e41bb1a904947aade8da SHA-256: 84e560f959aa3d11b2340d4f4928999b0b92ddd1fb0360a0293bd15aec22709c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting "free Robux" and game hacks. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-app-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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/431946152/free-robux-app-game-hack In PDF document text
    • https://nendientu.com/public/upload/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/mcpe-free-download_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/robux-earning-sites_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://nendientu.com/public/upload/files/robux-game_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
font_00_sfnt_off0000476a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x476A 25732 bytes
SHA-256: 683eec7f1bd33b21f94255077810b86ab364e0532bc2c9cb690cd9c970e7250b
font_01_sfnt_off000082a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A6 18192 bytes
SHA-256: b6ab7ec8c8ad827553cf0587115e299062cd48018093aec7e14a56fabc9ede42

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