Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f779cbb327aa47d…

MALICIOUS

PDF

38.3 KB Created: 2021-05-23 22:23:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f38f1369f3d2f9aa74518b458068165 SHA-1: 1085fb90a85fa15f77bfb24ad760a7fa4577dc79 SHA-256: 9f779cbb327aa47d57363ceb492b7c742e5f7c39b274ea390ad110608ef3ac43
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'free generator / game hack' for Roblox. The document body and embedded links strongly suggest a social engineering lure to drive traffic to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

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/earn-free-robux-on-roblox-game-hack In PDF document text
    • https://www.acacss.com/images/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.acacss.com/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • https://www.acacss.com/images/free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.acacss.com/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000302e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302E 26024 bytes
SHA-256: 7959e58188bfa602a60dc6020700071e97e34b80aad92eb3ac88f8b89ff49651
font_01_sfnt_off00006a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A16 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off00007407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7407 18316 bytes
SHA-256: 9c0981cacc72906997edc94ef8681ff328413c242d975763da1b98cbde4aeec5

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