Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a09f4a3f7ce807…

MALICIOUS

PDF

44.0 KB Created: 2021-05-17 05:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c78dd6eff02c90c8b03f61a9642d6fd7 SHA-1: 6a865abd00517760d3bdd868a853875226db86ef SHA-256: e4a09f4a3f7ce807cd60bfccec51d24b2843577ed0c7ae175f7786bc5c491df5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically pointing to 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-spins-on-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to lead the user to malicious websites, likely for phishing or malware distribution.

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-on-coin-master-game-hack In PDF document text
    • http://www.adravietnam.org/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://adravietnam.org/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn 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_off00004844.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4844 24896 bytes
SHA-256: e80b73065296f27a573748724256cbf1ced4ad987a63f4f44b8d528742798257
font_01_sfnt_off00008108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8108 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA9 17884 bytes
SHA-256: addbd5428a422ca7211e94293fed3a4f98c85d5f6337328d4d3623e90d90c649

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