Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a2fd037a2b9e35…

MALICIOUS

PDF

34.0 KB Created: 2021-07-19 19:22:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6b4a177887017a1716f65ef60b70d920 SHA-1: 843b1fb28571876892bf17d475a5d130aa9caf74 SHA-256: b0a2fd037a2b9e35467a0a48a41cf1b66daf0df8bb6ca74af953fab585c298da
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and free item generators. The ML classifier also flagged this PDF with high confidence. The document body and embedded links suggest a lure for users to click through to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/431946152/how-to-get-free-robux-on-phone-game-hack In PDF document text
    • http://www.bernardisrl.eu/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.bernardisrl.eu/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.bernardisrl.eu/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.bernardisrl.eu/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://www.bernardisrl.eu/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.bernardisrl.eu/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.bernardisrl.eu/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bernardisrl.eu/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.bernardisrl.eu/images/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://www.bernardisrl.eu/images/free-robux-site_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
font_00_sfnt_off00002def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEF 23000 bytes
SHA-256: 0fdd40ea0b9f59944cb200ad71dd672129c49efbf2ae6260077442adede45fab
font_01_sfnt_off00006189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6189 18788 bytes
SHA-256: 6852338db6f3c7567e169710b83fedb5698b09b1cf918a35efe09c4db198a139

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