Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09261de689eef4c…

MALICIOUS

PDF

29.3 KB Created: 2021-07-20 18:40:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 82fce0cc75f1216427512cacd7457352 SHA-1: f567489d4a64915ede5b7284995fc6be4f8a6292 SHA-256: f09261de689eef4ce0fb7587c8832bf4cedfd53882715a30196132de8fb45ae7
130 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The embedded URL is designed to trick users into clicking, likely leading to a further stage of infection or a phishing site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

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-hacks-on-roblox-game-hack In 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_off00001f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F92 21744 bytes
SHA-256: 970462442ab88f9163ea734383831c23b9d0d59f09825f8eff0e8a585077bfc9
font_01_sfnt_off00004f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F87 18636 bytes
SHA-256: d2de202f9aa25c491956fe63874a7d79bb7bc74997408c256f0bbf2d62c0ce59

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