Malicious PDF — malware analysis report

Static analysis result for SHA-256 062c4125b103cbd7…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 15:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 932f18b10b9316ed12c60063c18a8e8e SHA-1: 24b773dd31b7dd693de64f4f85cacbc69084437e SHA-256: 062c4125b103cbd77b9309ca7de8db3de7cf9d74e37b90f92d3fa4f5f562868c
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document employs a lure related to game hacking and free in-game currency, directing users to external URLs that likely host malicious content or phishing pages. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting the payload. The ML classifier strongly flagged this PDF as malicious, supporting the observed malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-hack-someone-on-roblox-vermillion-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/free-roblox-redeem-card-numbers_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/buy-all-free-items-roblox-javascript_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-easy-and-fast-on-phone_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/bloxwin-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-phantom-forces-cheat-table_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-shinobi-life-face-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-form-jazz-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/cheat-mine-simulateur-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-com-passwords-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-groups-no-owner_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-stuff-on-roblox-without-no-hacking_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/descargar-roblox-free_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
stream_002_off00003025.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3025 22940 bytes
SHA-256: a98716c9e089095a73022cd5b4b5e7eafe0cb9929ba1ace2449b99a7f7036bb2
font_01_sfnt_off00006385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6385 19336 bytes
SHA-256: ed4884698d2aa22a3d9a20c3298e1793267d4022c9a5e93eb1ad89fb56ba5d6e

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