Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c199c229ef4d4dc…

MALICIOUS

PDF

51.0 KB Created: 2021-06-03 09:51:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 18b8dd945794027fc1e1314ae5e539d8 SHA-1: 60b92ce4a20861d8206f7c0343ed352f30f92fa2 SHA-256: 0c199c229ef4d4dc0a9a26e3f8717fade8dcdcf3332112ad23a7d1a5e299edb2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically promoting "free coin master coins and spins game hack". The ML classifier also flagged this PDF as malicious. The primary lure appears to be a game hack, which is a common social engineering tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

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.online/app/406889139/free-coin-master-coins-and-spins-game-hack In PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/buy-tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/static-moonactive-net_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53EC 25116 bytes
SHA-256: acf631e8660ab5da154d09529624d95240ecee9464ab1a41569a50a091734a79
font_01_sfnt_off00008d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9A 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off00009b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3B 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off0000a52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA52B 18060 bytes
SHA-256: 11bd500b33c169b65e53ecddb4cd7ac7428d9a9bdc32d60ba78f45c9260aee9d

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