Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cd4a2dc0c5103a…

MALICIOUS

PDF

35.1 KB Created: 2021-05-23 13:14:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b8a7c8ad56e6910591ce40ce4e509bd4 SHA-1: dc339480ca7df69ba4d7dd8e44ae1278579e7dc4 SHA-256: 83cd4a2dc0c5103a4985ae135452a0c6fc3e8a2f5fcb004448fa317dabb70072
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that are associated with malicious redirector infrastructure, specifically targeting users with lures for game-related cheats and generators. The heuristic firings confirm the presence of malicious redirector links and a lure for a download button, indicating a phishing or scam attempt. No scripts were extracted, but the document body and embedded URLs strongly suggest a phishing campaign designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/479516143/free-minecraft-bedrock-game-hack In PDF document text
    • http://famoirs.co.uk/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://famoirs.co.uk/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://famoirs.co.uk/images/free-tiktok-followers-without-downloading-apps_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000336c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x336C 23624 bytes
SHA-256: 83d8e6af6534646bbd452331e71564302424a9934ab162d8468a2e07c7aa39d2
font_01_sfnt_off0000680a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x680A 18268 bytes
SHA-256: d34bffa2112548f8729f10b9022dbaea9618b038b2dadf4195d892bf0ac95b27

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