Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f00a2b0c778608…

MALICIOUS

PDF

36.4 KB Created: 2021-05-10 11:45:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f9f990fed237e34596859448ae1f3b35 SHA-1: 8aefa637b10295fcc433bfe0dbdfc78b21ceb264 SHA-256: f0f00a2b0c778608f1f2b7711df74b902c9aa1ce394614ef3b70c7c395027dc1
130 Risk Score

Malware Insights

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

The PDF contains a lure for a "Coin Master Cheat Apk Free Download" and embeds a link to known malicious redirector infrastructure. This suggests the document is designed to trick users into visiting a malicious site, likely for malware distribution or credential harvesting. No scripts were extracted, but the embedded link and lure strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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/406889139/coin-master-cheat-apk-free-download-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
stream_003_off00003395.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3395 24344 bytes
SHA-256: 35b46bfa5b352e10671b1c012178d7b9dcf996860ee4d24ce1753a5631b7c39d
font_01_sfnt_off00006b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4C 18800 bytes
SHA-256: 614973bcdfa501bdaf060565b49be4cc884ef58c8073729baf941f509f050db5

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