Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab03889644b0fd38…

MALICIOUS

PDF

53.0 KB Created: 2021-05-19 11:09:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fc63bbafffad0e5f1866d67f53c540f5 SHA-1: 4dfba1188369326aaaa12e4aaf42ec8c62e4bb19 SHA-256: ab03889644b0fd380b75ba3a0b4545324667d0bd0c50493b355ff123d487ee3f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO-friendly PDF links, suggesting a link farm or content aggregation tactic. The document body and extracted URLs indicate a lure for free in-game currency (Robux, Coin Master spins), a common social engineering pretext. The ML classifier also flagged this PDF as malicious, reinforcing the suspicious nature of the content and its likely intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9017

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-generator-2021-no-human-verification-or-survey-game-hack PDF link annotation
    • http://abris-jardin.be/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/rbx-roblox_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://abris-jardin.be/images/coin-master-offline-hack_GM406889139.pdfIn PDF document text
    • http://abris-jardin.be/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://abris-jardin.be/images/free-robux-no-verification-2021-android_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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000472e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x472E 33892 bytes
SHA-256: 294ebd3fa19f430e5b2ce5a6ee79839400af03cab08a6ee392bcd54a340add78
font_01_sfnt_off00009207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9207 3016 bytes
SHA-256: 4c3e2db5174821787a4569c9da4979555510caebd15fb9cea35573c139e242bd
font_02_sfnt_off00009c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C66 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off0000a90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA90D 19556 bytes
SHA-256: 76adbda1d3e57e3064df3e292cf485a94c26c1a96e5d3a4e3c484cd1a4e129d0

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