Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1f529be07793c1…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 03:16:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7efd660ef6878b8ec858277fbd58065c SHA-1: 85215a224db8ca1809489ada3d2a69cc3464f00e SHA-256: 7c1f529be07793c1d3630ac1a9a123a561baf8125c946059175be9b790a4416d
82 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and free in-game currency, directing users to the URL http://netcdn.tw/app/431946152/ww-robux-game-hack. This URL is likely part of a phishing or malware distribution scheme. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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 http://netcdn.tw/app/431946152/ww-robux-game-hack PDF link annotation
    • https://ezgolfer.com.tw/image/data/files/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-gift-card-uk_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-anime-free-shirts_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-support_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-items-on-roblox-names_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/cartoon-roblox-character-free_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/minecraft-java-free-download_GM479516143.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
stream_002_off000031ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31CE 22656 bytes
SHA-256: 8bfe5fbd7e9dca0032e4dd210bf67f53b34231d1322a4fe476bc58b36c3348d6
font_01_sfnt_off000064bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BB 18912 bytes
SHA-256: d0da06c06563365e25d678163380f8c7fa6b55e71fb2929e51ced219e7911ccc

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