Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a57df4abb13cea…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 19:46:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ff9fd1909811a0a86862fd37f3f5cbfd SHA-1: f344b91bae3f4b6e59be947936310f5796e5d4dd SHA-256: 50a57df4abb13cea3458d901b851dde00067759ecaa362977b7ec22ac7f1dc9c
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free in-game currency and hacks to trick users into clicking malicious links. The primary link redirects to a known malicious infrastructure, and other embedded links point to an IP address hosting further malicious PDF files. The document's content and structure strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/406889139/free-coins-coin-master-2021-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-card-codes_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/roblox-hack-diamond_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-deutsch-pc_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-high-school-for-free-to-play_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-builders-club-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/on-roblox-adopt-me-how-do-u-hack-someones-pet_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-on-roblox-no-usb-no-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/can-hacking-in-roblox-get-youarrested_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-robux-for-free-for-robloxcom-free4mobile24com_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-do-you-get-1m-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/break-free-roblox-music-id_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-2021-apk-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/prisonj-life-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-money-in-gas-station-simulator-roblox_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_off00003122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3122 23196 bytes
SHA-256: 2c7db9a5c1825f8a81dbe89ec70c87d41b5809526501a46efddc3ef03e2e1bbc
font_01_sfnt_off0000658a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658A 18400 bytes
SHA-256: 2a3e6040a3b782e95a9624477cdba266f2d22bc61ba2df799c05fa910d77e25c

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