Malicious PDF — malware analysis report

Static analysis result for SHA-256 023180ac7d92a016…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 21:10:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b08176295c1a6b39b765a6f07105f511 SHA-1: d522421a33dda84e06f8320e8510cab4a740090c SHA-256: 023180ac7d92a0169eb86615fa9ce097dd091983aadcbefbfd8dfcff14aa6f08
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a known malicious redirector, http://netcdn.tw/app/479516143/minecraft-free-download-android-apk-014-0-game-hack. The document body also contains similar lures for game-related downloads, suggesting a phishing or scam attempt. No scripts were extracted, but the embedded URLs and the nature of the lures strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/minecraft-free-download-android-apk-014-0-game-hack In PDF document text
    • https://mbbs.hr/files/free-anime-roblox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-skyscraper-tycoon-hack-script_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-black-pants-red-shoes-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-generator-robux-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/roblox-hack-2021-working_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/popular-roblox-games-for-free_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/tiktok-follower-bot-free_GM835599320.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_off0000315f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315F 21936 bytes
SHA-256: 02a6ebb890b53d832aa5b5a2fbb68276d491193f5403d190c43c0222ecccb50a
font_01_sfnt_off0000619e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619E 19264 bytes
SHA-256: 236b2d6becf4b44281e5d2374742c13aefbd8eed6387f01a7c406484cc2c48d9

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