Malicious PDF — malware analysis report

Static analysis result for SHA-256 48eb832c5a96903e…

MALICIOUS

PDF

34.4 KB Created: 2021-06-22 08:07:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: bdf879251189e1acd5032a806c20aa32 SHA-1: 1ffd808a96c5fcc80d2b5bdc2335817d3f819490 SHA-256: 48eb832c5a96903e6d037053f7bce23d7d67e5ee04e70cd2c738e19527faef8c
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and text referencing 'free Robux' and 'free coins', indicating a lure for users to download potentially unwanted or malicious applications. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent. Although no scripts were explicitly extracted, the document's structure and content suggest it acts as a dropper or redirector to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.co/app/431946152/freerobuxhack-us-2021-game-hack PDF link annotation
    • http://jarviskeller.co.uk/media/storage/editor/files/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/711-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/granny-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/real-roblox_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/free-robux-de-ohne-handynummer_GM431946152.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://jarviskeller.co.uk/media/storage/editor/files/new-update-roblox-free-2021-explot_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_off00002f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3F 22172 bytes
SHA-256: 2c1c5601a802f4b6d83c933301aefeb518b4d58f3857bdc0d771ca02fa52b2f9
font_01_sfnt_off00006066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6066 19452 bytes
SHA-256: 43b81a284332bbcce6e172d110dbc1a63e46633337d5d3ab3430c81f8a1ab5e6

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