Malicious PDF — malware analysis report

Static analysis result for SHA-256 876a856cfff18428…

MALICIOUS

PDF

36.5 KB Created: 2021-05-21 18:32:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0dacd9dba90307c0b510efb49b30160e SHA-1: a1080704f173ba262bc636aa19f57ae647754671 SHA-256: 876a856cfff1842886e2225971716c545e1d8c292e2d6d012686ccf3e7e6f1dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising a "free generator / game hack" for Coin Master. The document body reinforces this lure with similar text and a call-to-action. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further stages of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/free-spins-on-coin-master-link-game-hack In PDF document text
    • http://vedrachemicals.ro/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-hack-spins-apk_GM406889139.pdfIn 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_002_off0000359d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x359D 24836 bytes
SHA-256: c601dfcedfc7c898b63e324fea8b149fabfa641c9f86818a44f55494142e5262
font_01_sfnt_off00006de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE5 18056 bytes
SHA-256: 892ebf3b86ae534fd3f474e2c239da2a9bb4dc91f8225dc09222a78aadec1336

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