Malicious PDF — malware analysis report

Static analysis result for SHA-256 521350ba25ff5e67…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 19:09:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d6da2d7c4619c95a52f458186a97bf3d SHA-1: 0c709abc95708b2203f1cee4d9c53c2480f9e349 SHA-256: 521350ba25ff5e67402a5c5c955c578ea200afc3d00b32fa805bf217334099bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-arsenal-hacks-download-game-hack. The document's structure and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/roblox-arsenal-hacks-download-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hack-download_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-outfits-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-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_003_off00004838.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4838 24868 bytes
SHA-256: c677d33ebbfab7977213363bb2a7143796a0f87679ad01f1f8d7addf34118179
font_01_sfnt_off0000816e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816E 18688 bytes
SHA-256: 3194e743087210276cc8ef30afa20718d77c17967e4a232ddce90cfa751f40c3

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