Malicious PDF — malware analysis report

Static analysis result for SHA-256 554e041a62feb43a…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 20:45:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1be1703f4c77b78627580c69ca2856b9 SHA-1: 1987e03ee79b844b8d611f8feaef7bf288580cb5 SHA-256: 554e041a62feb43addf8ad1b7d255ae31177e2982e4264ac13ded18c89ad0f31
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game items and hacks, directing users to a known malicious redirector. The embedded URL http://netcdn.tw/app/479516143/free-minecraft-alt-accounts-game-hack is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/free-minecraft-alt-accounts-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/can-you-generate-robux-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/rbxnow-gg-get-free-robux-on-roblox-playing-games_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-in-30-seconds_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-murder-mystery-2-modded-free-admin_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-inspection-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-in-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-how-to-make-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/real-free-robux-codes_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_off000032b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B3 22332 bytes
SHA-256: 30867ee65216abf4bb9a9e4ac1df6add8f46c259229f51f132f2d372bb4b0856
font_01_sfnt_off00006328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6328 18212 bytes
SHA-256: a587ad5d7ccc78e3894402c93b871667a6b3b423df15bdaf3724955d5b668927

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