Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd02e51dcea3422…

MALICIOUS

PDF

44.4 KB Created: 2021-05-14 17:12:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 838b50bc6ddf6173b5454edbcf9d2d56 SHA-1: a5d27c534fc1d45d44ec11315e7c0378f006fc25 SHA-256: fbd02e51dcea3422678aa9b4b5380c2b6e735e9464612506484d86e39564f251
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' to lure victims. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-do-you-get-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a redirection-based social engineering attack, likely intended to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-do-you-get-robux-game-hack In PDF document text
    • http://grupodin.com.br/images/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-online_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://grupodin.com.br/images/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://grupodin.com.br/images/spin-coin-master_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2C 27540 bytes
SHA-256: 5626fff1dc184b5ef45f285ba79ef05143fe7600bd4dcd739b5279adfac3ed8d
font_01_sfnt_off00008a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A89 18448 bytes
SHA-256: d9f15c8d06a9f68edc08429574edcd345d0edfc323a0421ca163819fb1e2672f

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