Malicious PDF — malware analysis report

Static analysis result for SHA-256 792abc71612562f3…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 23:50:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9ef0e8528f887dfb662050a12c0ad2fb SHA-1: b94a8f6a7be1b3d9269cdaad6fd8e7057a71a19e SHA-256: 792abc71612562f3382c14e65b5fb4fcd8daff99fed4a3364cfc6d9d367c5443
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free spins' to lure users. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/coin-monster-game-hack In PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/toolbox-apk_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000522d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522D 31456 bytes
SHA-256: c4d8f9b858690cc02553355b946cb55e1b5d00fe069857a61ca43b64792bb3b7
font_01_sfnt_off000097d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D7 17320 bytes
SHA-256: 54c278ffcec73a9655cb4160ce6dd033c6157d5b4cbbc3723f9166d6c62366d0

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