Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cbf0bd83d711700…

MALICIOUS

PDF

36.2 KB Created: 2021-05-21 15:30:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4915a5f5dec33000d34a41b1cf7b6c70 SHA-1: 6b739977c3932bd4c8904eb1dfa52a66601b5da2 SHA-256: 2cbf0bd83d7117001c06ba2f1d57dfb3ff6aa78fbed754d14fee0cbe1123294e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure, disguised as a 'free generator / game hack'. The document body explicitly mentions 'Free Robux No Generator' and includes a call to action to access a 'ROBLOX GENERATOR'. This indicates a phishing or scam attempt to trick users into visiting malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-no-generator-game-hack In PDF document text
    • http://www.ocic.hr/files/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-no-verification-at-all_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_off0000324d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324D 24944 bytes
SHA-256: a0e49befd3c18a578e30f91e7532b6e2cf39fdc39bfe650966c5d53d6ae25d02
font_01_sfnt_off00006be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 18344 bytes
SHA-256: d0a2580a9848789708f711aeedd4c44eef26827bf748da476089155bc80243e8

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