Malicious PDF — malware analysis report

Static analysis result for SHA-256 c054f3d9ab790ab6…

MALICIOUS

PDF

51.0 KB Created: 2021-06-03 23:43:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0c943a2879e03ea146c4c892f43060ef SHA-1: ce11dae71e0a768c62297cfa0fb7a067aa1fa2aa SHA-256: c054f3d9ab790ab61bdccc924d036ba106a22432a0c6affe7eadb0f5056ea377
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links designed to lure users into clicking on them, promising free in-game currency or hacks. The links point to domains that are likely part of a scam or lead to malware downloads. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-free-robux-for-free-game-hack PDF link annotation
    • http://perpus.i2s-learning.com//repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/pokemon-go-fest-free-tickets_GM1094591345.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/no-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/tiktok-free-wifi_GM835599320.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/ways-to-get-free-robux_GM431946152.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_004_off00004ee2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE2 31492 bytes
SHA-256: 466d4dad11fac8999bd919c94ea5773b91b9bba7e82abcb3dbcb55e892b816c6
font_01_sfnt_off000097ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97ED 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FF 18280 bytes
SHA-256: 2eeeedfcb2f224ab556fa0ab031baeab03f86dcbcf90e3baaaf5b6d88536dec3

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