Malicious PDF — malware analysis report

Static analysis result for SHA-256 264722208f947a59…

MALICIOUS

PDF

46.7 KB Created: 2021-05-11 22:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d9852f7e1608ad137ac5c132c021a1b8 SHA-1: e7737da75dc44620165dd38a1d439475c561c811 SHA-256: 264722208f947a5961acffd4bb7e608cb1fcec3cc0ae2e46ba924b6219d2becd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically advertising free in-game currency generators and hacks. The document body and heuristics indicate a lure for users to click these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the embedded URLs and redirector findings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index-game-hack In PDF document text
    • http://mbbs.hr/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-converter_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-unlimited-spins-hack_GM406889139.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_off00004d52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D52 25128 bytes
SHA-256: 99455c8e24e6020dc27495e607f1c43e55bc44892da11408fba8f802cf755455
font_01_sfnt_off00008688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8688 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9073 19440 bytes
SHA-256: 758f131b5ad06ada387de192ccba962ec8204edab22f872f65cf4aad9f2ca4c6

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