Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aef56c09868c4dd…

MALICIOUS

PDF

35.6 KB Created: 2021-07-09 15:36:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4beb12c5cccec4fa53baa6b7a4f9c06b SHA-1: d573a10250b1d01be533351aa8729cfb92af07b1 SHA-256: 3aef56c09868c4ddf788deeec81b9dec1ad1e34afaa5cdc113dff69be1c1e9b3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free packs to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/free-game-pack-with-google-play-coin-master-game-hack, redirects to a malicious website. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

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/406889139/free-game-pack-with-google-play-coin-master-game-hack PDF link annotation
    • https://au-ma.com/image/data/files/buzz-the-bee-robux-hack_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/pokemon-go-free-yanma_GM1094591345.pdfIn PDF document text
    • https://au-ma.com/image/data/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-free-easy-robux-vortexx_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-murder-mystery-hack_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-synapse-exploit-download-free_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/fe-hacks-roblox-free_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-free-accounts-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-roblox-face-accessories_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/script-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-free-robux-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-hack-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/cheat-roblox-windows-10_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-download-robloxcom_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-roblox-hacks-no-human-verification_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_off000031e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E7 23076 bytes
SHA-256: bd4b128922fdfc0b9d2db1d4420a0ddb93220562e4c1a262ec65f7afd0130923
font_01_sfnt_off000065f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F5 19200 bytes
SHA-256: e4d408b22f093965d0c9139718e3ddc1d82d6c802d3d202cf78b1d5fc7aeb7b4

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