Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d354b2f7434814…

MALICIOUS

PDF

43.8 KB Created: 2021-05-12 01:30:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f7369a88a908c99333af38b4399ec4ba SHA-1: e1df688ca23b50967372e5d92f17d1603fad9b00 SHA-256: 82d354b2f743481491978e58104eec0b700f4a7d66738e77a1396129222e916f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game generators and hacks. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-spins-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/406889139/free-spins-coin-master-game-hack In PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EF 23820 bytes
SHA-256: abaf1d3d192379369b91445df7045f60cc1ab4a99b650a63b074f15783ddb46c
font_01_sfnt_off00008035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8035 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000089e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E7 17884 bytes
SHA-256: 18816d8d761583b578c9833b8849e2eeaed27ef2f16a893d2032c58e3f8148b6

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