Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2da5b5d94ae651b…

MALICIOUS

PDF

33.5 KB Created: 2021-07-20 11:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e35681b2255d1f52f923dfeda409c024 SHA-1: 6a6df6dae76ba7404d487b0052295f2616d37212 SHA-256: d2da5b5d94ae651bcd11338699581e1608ee16a41281b97ee119ee5bd2f99da9
200 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as a 'Robux Free Com' generator. This lure impersonates Facebook and uses a call-to-action button to entice users to click the malicious link. The ML classifier strongly indicated maliciousness, and the overall pattern suggests a credential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/431946152/robux-free-com-game-hack.
  • 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/robux-free-com-game-hack In PDF document text
    • http://sagrasantacroce.it/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://sagrasantacroce.it/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-do-you-get-minecraft-for-free_GM479516143.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_off00002df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF5 22608 bytes
SHA-256: ea846a97167ffe93fd329009c0574f58574739b7b5ff99fb0a935e52f7abe9e9
font_01_sfnt_off000060a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A7 18460 bytes
SHA-256: af486b5e69f7ce055209fde0c3fc8412e83348f9e9adea78a60ef2feccaab9c1

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