Malicious PDF — malware analysis report

Static analysis result for SHA-256 52bbf510f578c652…

MALICIOUS

PDF

38.3 KB Created: 2021-05-11 20:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 270da6480fafeed5a65bf3519f433cdb SHA-1: 555385469273ec64453d379f6e19b116dbc06dcc SHA-256: 52bbf510f578c6520a5050d39acf1b91a4358e210f0897dbeebfd98686a8907b
170 Risk Score

Malware Insights

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

The PDF document contains embedded links that impersonate Facebook and lure users with the promise of free game resources, specifically for Coin Master. These links redirect to known malicious infrastructure, indicating a credential phishing or malware distribution attempt. The use of a game hack lure and brand impersonation are common tactics in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier clean score 0.0126

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: https://netcdn.xyz/app/406889139/coin-master-free-spins-coins-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 https://netcdn.xyz/app/406889139/coin-master-free-spins-coins-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000034bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34BC 24532 bytes
SHA-256: c0bee4d8c74a2af6f321d88a7cffe78776d4ff6e715303ce6ff220f9c171a0ef
font_01_sfnt_off00006ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA3 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7554 17884 bytes
SHA-256: 7b855ef2bb944b5b370c61480927ccad63ff31bdbf820bc1f0da9d35a10f5fb2

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