Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4db6df33406128…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 15:16:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 14d912a3f5794a02d09101a00dd0cb23 SHA-1: 4d036f0a5893a75b5a7f9315df088286bbcaddf9 SHA-256: 0b4db6df3340612841b3df111cd153190bc831926231ef81310b08ffef3ac67e
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising free spins for the game Coin Master. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this behavior. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 3

  • 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/coin-master-free-spins-17.01-20-game-hack In PDF document text
    • http://pia2000.net/images/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/get-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://pia2000.net/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/roblox-robux_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_off00004f1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F1B 24816 bytes
SHA-256: 3b54d7d1bf2abbf45839781f75109b62cb7d6777dbb7010285ecb8f59a7384a4
font_01_sfnt_off0000882e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882E 18412 bytes
SHA-256: 9ac9f89e759ea14d78fe75fd289c7970ab7e0194cb03454a79661fe4609173b7

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