Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac917a9cbaa63a5…

MALICIOUS

PDF

35.7 KB Created: 2021-05-23 18:30:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f03b6be9d4844c41db6691afe5787282 SHA-1: 1097b2c3e7e6df815737445070a8b5318ba67c8a SHA-256: 3ac917a9cbaa63a53bccb7639e6824a02ae457b7fa9b9a8b32e6f6ec636eeb67
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, one of which, 'https://netcdn.xyz/app/406889139/free-spins-from-coin-master-game-hack', is identified as a malicious redirector. The document body and heuristics suggest a lure for game hacks or free spins, aiming to trick users into visiting this malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a potential for exploiting vulnerabilities or redirecting users to malicious 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/406889139/free-spins-from-coin-master-game-hack In PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/how-to-buy-robux-for-free_GM431946152.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_off0000330c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330C 25232 bytes
SHA-256: 21e2ae0a5dfe3400efd4e59d897d0aa046972bc424d8483a175b1281397f6e74
font_01_sfnt_off00006ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB5 18148 bytes
SHA-256: a8179ab01d9f651dd6fb5ce3364ead5561884d8b40fe8a62eaf26fde05d0c646

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