Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3725b894767917…

MALICIOUS

PDF

35.3 KB Created: 2021-05-25 09:06:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 53881cdef028b546012bdef237110221 SHA-1: 208a7e01a36c6f839a6e4908133731773ae4da4b SHA-256: 1b3725b894767917407fb4f8d6cc35002c0dade702c9e7f7c8a3a7535e292992
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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/835599320/free-tiktok-followers-game-hack PDF link annotation
    • https://amozeshportal.ir/assets/uploads/pages/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/claim-roblox_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://amozeshportal.ir/assets/uploads/pages/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B3 23920 bytes
SHA-256: 3f13dbf0f51daec9064c1dbd97f7a74ab49caf375d35e75042e40a6653b66437
font_01_sfnt_off00006a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7A 17692 bytes
SHA-256: ba2215a0f2290c6faad19fe6968ba231152e54b1cb241ca137cf69db350684c8

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