Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b30bd102401da0b…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 06:34:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6ffc479c20eca6015d6329c6389e7550 SHA-1: 3a75b26dd5fabe01630de61a665ca7c42f94d868 SHA-256: 0b30bd102401da0b40c53f973132751bd553849f04545c1a48e596d713fa0d7b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/479516143/free-minecraft-thumbnails-game-hack PDF link annotation
    • http://foo.com.tw/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-robux-codes-that-work_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/is-tiktok-free-on-iphone_GM835599320.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-do-people-make-roblox-hack-tools_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/robux-hack-download-no-humanverifycation_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-free-clothing-roblox-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/get-free-robux-for-free-no-surveys_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-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
font_00_sfnt_off00002f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5C 22612 bytes
SHA-256: c8e23061af1ca6092cbe1ab4180e69f432d68c675d0807779adcb20bc9ea7aa3
font_01_sfnt_off000061c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C8 18652 bytes
SHA-256: 8cb94b06f77e1baa2d49adc168d2190632a611d700f1536995b593d613ae9b0b

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