Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac753b19b6f5af0d…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 08:52:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e9e4d55d6624557d21ba0cc2f8fd27ad SHA-1: 0b561428e3acb5132337d897ef39032e10e17c8e SHA-256: ac753b19b6f5af0d3873243878be8f93eea620b4f08e09e8de37d6774e5e83f5
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-risk heuristic indicating it links to a game hack lure, specifically mentioning 'Coin Master Free Spins'. The document body and extracted URLs reinforce this, pointing to a URL designed to trick users into believing they can get free in-game items. This suggests a phishing or scam attempt, likely to redirect users to a malicious site or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.tw/app/406889139/coin-master-free-spins-save-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/best-free-weapon-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-build-a-boat-free-plane-codes_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/armored-patrol-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/pubg-uc-20_GM1330123889.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-cheat-in-roblox-pokemon-brick-bronze_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-need-password_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-generator-com-oprewards_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-clothes-boy_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-dominus-frigidus-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-robux-for-free-no-signing-in_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-hate_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-redeem-code-free-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/wurst-115_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/invisible-hack-roblox-2021_GM431946152.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_002_off0000300c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x300C 23612 bytes
SHA-256: b4c71f8aa6edf7df79d4ef0f963a97ad21d2135769959780998e6ae571728e17
font_01_sfnt_off0000659c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659C 18288 bytes
SHA-256: f64419199b4080c9b5b74d14bb4d3041b33e9c5b1581878cbb74ccdc781f789d

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