Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0bbe594988227b…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 10:38:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1f879ac53e3250f118f49c055bf14f3d SHA-1: 64726b9d9af606fda032ca3da6b89f1fdff946e5 SHA-256: 2f0bbe594988227bcba7a2244a4fabd4567c04117253b9a86854f5e1d312b953
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a redirector URL, disguised as a game hack generator, which is a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a second-stage download or exploit.

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/robloxhacks-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/gamesofficenet-hack-coin-master_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_off00005110.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5110 24092 bytes
SHA-256: 0e55c9ddba45ece5ef2ae5c29d3ac1be82761879932d6f8bc6db05c9f67a9359
font_01_sfnt_off0000883d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x883D 18348 bytes
SHA-256: 4c82b5acf2344fb6074e769b7bb8f458d53ebd76102ce4f277dd7245c06f6447

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