Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3828b8067d6eb7c…

MALICIOUS

PDF

33.6 KB Created: 2021-07-01 15:32:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 480afd2509309fdb87f37d9cd1220de0 SHA-1: ddf5969e9e55dd0595a7eeb5382ceb68cd3ef94a SHA-256: c3828b8067d6eb7c44aff1be81d5e4e7f3ac441634a66769a7f49b64e9d3cead
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that are identified as malicious redirectors, specifically targeting users interested in game hacks and free in-game currency. The primary lure is a link promising free Robux for Roblox, which leads to the malicious domain netcdn.co. The document body and heuristics confirm the intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-models-that-give-free-robux-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/hack-any-roblox-account-program_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-mac-exploiter_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-on-roblox-no-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-bighead-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hacked-version-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-synapse_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-get-com_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-link-list_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/best-meme-tshirts-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-items-in-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-its-free_GM431946152.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
font_00_sfnt_off00002d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6E 21456 bytes
SHA-256: 0c7a861db74afab11b533a331402c9913cd1d336a189d6aac28b18e1831babb5
font_01_sfnt_off00005c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7C 19664 bytes
SHA-256: e5057664a50207c599161a0cdcead05c5b33e8577dbdd2fb33f763ae1a034059

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