Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02c3386e3db189a…

MALICIOUS

PDF

39.8 KB Created: 2021-05-11 14:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e3197e0f0b3d0ab0d3822fa294ebeef8 SHA-1: 413e06e65df234baf194b9fc55f7b8abc0024595 SHA-256: d02c3386e3db189a60695e598fc8339dca5c4b0dee1fb4155c170d14a8b99b45
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple critical heuristic firings indicating it links to malicious redirector infrastructure, specifically promoting a 'free Robux' generator. The document body text reinforces this lure with phrases like 'Free Robux Instantly' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR'. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or scam site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-instantly-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
font_00_sfnt_off00002da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA2 25312 bytes
SHA-256: 91051d4bf7d5fcef3a4004873b0ae7468ba27db46f63038a88e599bea28500e8
font_01_sfnt_off00006864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6864 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off00007a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A46 18188 bytes
SHA-256: 05768a6b2069b216286029fa004232956403f095c30a59d7bee11566aadadb46

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