Malicious PDF — malware analysis report

Static analysis result for SHA-256 2caf4e850cad9f13…

MALICIOUS

PDF

45.1 KB Created: 2021-05-15 11:33:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2a37ab87b14498261ef8d60f73d3f564 SHA-1: 23a62ffb986264cedbb511841690ec91dc96ac9a SHA-256: 2caf4e850cad9f13c84fe8fa60edbfaa1010144bb41b8cc15640e06dc9eca6a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-gift-card-codes-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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/free-robux-gift-card-codes-2021-game-hack In PDF document text
    • http://ratchadatitan.com/UserFiles/File/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/generator-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/blogspot-free-spins-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_off00004c78.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C78 27364 bytes
SHA-256: 26a74cfcee140728c35b2b83b4cb9691ffcf322266cc901aaaaf683ebdbb9448
font_01_sfnt_off00008b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B70 19044 bytes
SHA-256: a83203ba6d4d8e4db234da74518c811315008a13a6a61ff598d06d89853e7c2b

Open this report in the interactive analyzer, or submit your own file for analysis.