Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcf710119fde615a…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 02:19:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a7746254183c8444f021135df1e92cae SHA-1: c898eb7aff1485e8df69745182537e4741b09d05 SHA-256: dcf710119fde615aa10b8823d0bbc9ef75c7e21d5f00339657e430bd350010e1
162 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. Several links point to 'game hack' or 'generator' lures, indicating a deceptive social engineering tactic. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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 https://netcdn.tw/app/431946152/roblox-rc7-hack-scripts-lumber-tycoon-game-hack PDF link annotation
    • http://jdlrelocation.com/images/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/commands-for-free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/set-it-all-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/free-robux-no-survey-mobile_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/cpat-hacker-in-mad-city-roblox_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/roblox-robux-hack-pro_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/free-spin-and-win-coin-master_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.micIn 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_off00004f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F36 26136 bytes
SHA-256: c8f88002068dd4f341306337706684c25652d8b2e8c386b8c2235d662930b475
font_01_sfnt_off00008af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF3 19216 bytes
SHA-256: 5ccb8520ed426d80b873ff48b70d78573406123a33d66370828d5743c01a4bc5

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