Malicious PDF — malware analysis report

Static analysis result for SHA-256 301d5894f74a4eeb…

MALICIOUS

PDF

39.0 KB Created: 2021-05-12 10:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 766aebb5ef3e93a65f44e5262ae0c602 SHA-1: 4c375009984d129e996935466d5ca9ba89e392ff SHA-256: 301d5894f74a4eeb70c59afa6e2a137d1bc92566638ad4393a968bd0e054a9bd
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple critical heuristic firings indicating it links to malicious redirector infrastructure, specifically promoting a 'free generator / game hack' for Robux. The embedded URL, https://netcdn.xyz/app/431946152/get-free-robux-without-human-verification-game-hack, is associated with this lure. While no scripts were extracted, the document body and heuristics strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/get-free-robux-without-human-verification-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003213.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3213 24516 bytes
SHA-256: 314e4e93fc7a40afdbae6e6c1749b2ec5dfadf495ceacd105dd8faff07315acf
font_01_sfnt_off000069db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DB 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off00007407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 19224 bytes
SHA-256: d26e558c8d9f3aa3a60cf99b5f2b698b808b007009279a89da7a3b2992804aa3

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