Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dac77d66f56630f…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 14:47:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 12fed678523bf96ce898b6a64a493a01 SHA-1: 5c19c01e59171fbede036e99ba47c50c30a8ec72 SHA-256: 5dac77d66f56630f57f0764563d09b2b375ca247fc71b017c090c389c75c9ce8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' to lure users. The primary redirector URL is https://netcdn.online/app/431946152/roblox-free-pants-game-hack, which likely leads to a further malicious payload or phishing page. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/roblox-free-pants-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/when-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-spin-link-today-free_GM406889139.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_004_off00005098.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5098 25424 bytes
SHA-256: fd3aa48b486477e1db1463f16e10d16a09a8b5f4b4a33e1653f95313e8e29f0b
font_01_sfnt_off00008b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B73 18436 bytes
SHA-256: 78f3703c71bf5a91131aef5e2f3ca285f6435d0e4871a8e776917510e9a384af

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