Malicious PDF — malware analysis report

Static analysis result for SHA-256 95069436c1fae313…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 06:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7e35db930ed3b5a24115dedb65854225 SHA-1: e70fbce9318a5cc59215cfddddd18c4927b9e058 SHA-256: 95069436c1fae3131da2b95777ca96d9c8a45ccfd0a07612630abfc5daebdece
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector, disguised as game hacks and free currency generators. The document body and heuristics indicate a lure to click these links, likely to download further malware or lead to phishing sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-hack-facebook-game-hack In PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-hack_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/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://me.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.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_003_off00004af1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF1 24420 bytes
SHA-256: 225ce4b0f06a158f7f06fdf71830c64fcd8e7a57a8aded143e4c7ac4ff6b005c
font_01_sfnt_off00008266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8266 18040 bytes
SHA-256: a8842bd0617fa86dd082827eea584dec3a7ee10a35fb1e5666a6d76cd5718c44

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