Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7ec309a787777c…

MALICIOUS

PDF

41.9 KB Created: 2021-05-13 15:35:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aca128119d9d2c21d069d0649028106e SHA-1: 815a811bb71b4f70153864ffff8771455c5989ae SHA-256: bc7ec309a787777c2a4b5ea5d0569e3e1f14db041acca5a81d344aa29163da3b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a lure for a 'free generator / game hack'. The document body also contains text and a call-to-action phrase related to obtaining free Robux, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/how-to-buy-robux-for-free-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_off00003624.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3624 26888 bytes
SHA-256: d581a8810408d9b1a566c86c8eaeb468cfcc31e1e60a0ecdac1a6082d2ae7846
font_01_sfnt_off00007510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7510 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00008222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 18356 bytes
SHA-256: 42cf6025b0828d48dcef6abba26d08473f6f67d2383591dd07323470bab2f866

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