Malicious PDF — malware analysis report

Static analysis result for SHA-256 3268f576eabb3f47…

MALICIOUS

PDF

27.4 KB Created: 2021-07-05 14:17:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 62bf4d404a31d7df23359204799c5883 SHA-1: c932d9d117a612b767aee82179134c361d7f49fb SHA-256: 3268f576eabb3f4792ccb1fda31dd295535088a15e10e06a3fe9e5ee48ded625
130 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it links to a malicious redirector disguised as a game hack generator. The embedded URL and the document body text both point to a lure for a "Coin Master In App Purchase Hack", encouraging users to click a download link. This likely leads to the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0328

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/406889139/coin-master-in-app-purchase-hack-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_off000018ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CA 21840 bytes
SHA-256: a3160ef1ab13426b5e10c5d9765458ec8818ab0964f074cb1a3c00bda07292a2
font_01_sfnt_off000048e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E7 18640 bytes
SHA-256: b32abb43cc4c7bccbb4175f4b1f8177118e0a6c232745e5eac41a43dab3e9f7a

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